I've flown in 4 different business class seats in the past year and each had something that set it apart. Here's how Singapore Airlines, ANA, Air New Zealand, and La Compagnie compare.

Over the past year, I have flown in four different business class products. These include Air New Zealand's Boeing 787 Dreamliner from New York to Auckland…

I flew on the world's new 4th longest flight from New York to Auckland and Air New Zealand's business class made the over 17-hour journey easily bearable

…Singapore Airlines' Airbus A350 on the world's longest flight from Singapore to New York…

I flew on the world's longest flight in business class and thought the 18-hour trip from Singapore to New York was nearly flawless

…French boutique carrier La Compagnie's Airbus A321neo between Paris and New Jersey…

I flew on the world's only all-business class airline and it felt more like flying on a private jet across the Atlantic

…and most recently on Japanese carrier All Nippon Airways in "The Room" business class seat on its Boeing 777-300ER from New York to Tokyo.

I flew in business class on Japan's biggest airline for 14 hours and the seat felt more like a hotel room

All of these products were enjoyable for the long-haul treks, but they were all very different. Here's how the products compare.

I'll start with the best out of the four — "The Room" on ANA, Japan's largest airline.

I flew the product for 14 hours between New York's John F. Kennedy International Airport and Tokyo's Haneda Airport in March and absolutely loved the privacy.

The couch-like seat came with a full sliding door, which could fully cocoon the space.

There was also a button that opened it just half way.

This is the main feature that set "The Room" apart from Singapore's A350 business class seat — everything else was pretty much the same.

I loved the food on both. I had Japanese cuisine on ANA and a Western meal on Singapore with minimal complaints.

Moreover, both had huge beds complete with thick pillows and blankets.

Each bed was much wider than the skinnier ones seen on carriers like Delta, American, and United, so I had plenty of room to spread out. I could sleep on my side, back, or my stomach comfortably.

I also appreciated the plethora of other amenities available, including several storage options...

…huge televisions with a handheld remote…

…and plenty of power ports.

While Insider paid a media rate for the flights, I would definitely recommend both. I do like ANA's business class better simply for the privacy door, but neither will disappoint.

In addition to the two Asian carriers, I also experienced Air New Zealand's business class, and there were a lot of things I liked about the product.

This includes the food...

…the comfortable lie-flat bed…

…and the footrest. I was able to sleep during the flight and I felt rested upon landing in Auckland.

Moreover, I'll give props to Air New Zealand for its on-demand ordering. I could use the TV to request snacks and drinks whenever I wanted and have them delivered to my seat.

While I overall enjoyed the seat, it has its shortfalls compared to ANA and Singapore. For example, the flight attendant had to manually set up the bed for me.

Granted, Singapore's bed has a handle on the back of it rather than a button for lie-flat mode, but it's easier for a passenger to use because it's basically the same as lying a car seat flat.

Another issue with the bed is it doesn't have as much privacy. The cabin is configured in a 1x1x1 layout, so the middle section and the right side of the plane can easily see each other across the aisle.

The left side, on the other hand, has better privacy. I'd opt for one of these seats if I flew the carrier again.

But, the angled configuration also means the seats are facing away from the window, so it was really difficult to enjoy the view.

My only other issue was that the television was pretty small, and I had to stow it for takeoff and landing.

However, it appears the carrier is aware of some of the critiques and has created a new business class to fit onto its Dreamliners.

Starting in 2024, the new and improved Business Premier seat will address some of the problems with the current product, like installing a bigger TV…

I tried Air New Zealand's new business class seat coming to its Boeing 787 aircraft on order and I think it's a major upgrade from its current product

…adding a half-sliding panel for more privacy...

…and allowing the bed to convert into lie-flat mode at the touch of a button.

The company is also adding a Business Premier Luxe seat that will have a full sliding door…

…and space for a second person, who can join during the flight for dining or a business meeting. This is similar to other carriers like JetBlue Airways' Mint Studio and Virgin Atlantic Airways' Retreat Suite.

Virgin Atlantic just flew its first-ever A330-900neo on a brand new route from London to Florida — take a look inside the swanky jet

After seeing the future product in person, I'm looking forward to Air New Zealand's new business class.

Disclaimer: Insider paid a media rate for the Boeing 787 business class flight from New York to Auckland in September.

The fourth airline premium seat I flew this year was on La Compagnie, a French boutique carrier flying Airbus A321neos between Paris, Nice, and Milan, and the US.

But, La Compagnie is not your average airline. Instead of a mixed cabin, the company has configured its narrowbody planes with 76 business class seats…

…making it the world's only all-business class carrier. Other airlines like Qatar Airways and British Airways have tried operating select planes with an all-business configuration, but have since retired them.

Overall, I really enjoyed the product, which came with all the bells and whistles of business, including a huge TV, a lie-flat bed, plenty of space, and charging ports.

Disclaimer: Insider paid a media rate for the business class flight from Paris Orly to Newark in February.

I also really enjoyed the food, which is a specialty of La Compagnie. The carrier partners with world-renowned chefs to bring unique meals onboard.

Source: La Compagnie

However, my biggest gripe was that because the cabin is in a 2x2 layout, the window seats do not have direct aisle access.

This can be annoying for solo travelers as they'd have to crawl over the stranger sleeping next to them. But, I don't find it a big deal if traveling with friends or family.

My only other minor issue with La Compagnie was the minimal storage space — one more shelf or cubby would've been perfect.

While the French carrier is difficult to compare to ANA or Singapore because the Asian carriers' cabins are simply in another league, I think it's comparable to Air New Zealand.

Some people may actually like La Compagnie's style of business class better — which is similar to United's Polaris or Delta One — though the lack of direct-aisle access could be a dealbreaker.

But, I think the boutique airline's level of comfort, convenience, and delicious food is perfect for the price, with roundtrip fares starting around $2,500, but can be higher.