Which is the better game in your opinion,  and why?

Legends. Easily. More variety and clever ideas. Not only that but it uses the gamepad and uses it well.

I've only played Legends. It's a fantastic game though.

DKC:TF. The characters have real weight, and excellent level design combined with excellent music(that I'm listening to now btw)

Both are really close but I would have to go with TF just cause the music is sooo good that it inches out from Legends

Also I don't like the character model's of Legends but the Envoriments are sooo good

To me it comes down to which controls better and that goes to DKC easily...I just don't enjoy how the Rayman games handle...it feels off to me.

I can't say. Haven't played wither yet :(

After I'm done both, I want to say I'll most likely like Legends more, but as of now my opinion is moot.

This is really strange I was asking myself this earlier today.

I saw the future...
I AM GOD!

They both are sooooo good.

buuuut DK:TF have to go with it.

I'm going with Legends, but it's a really tough call, they are both outstanding. I preferred the variety of environments in Legends which was the tie breaker, even the soundtrack to Legends wasn't as good as DK.

Each was quite different from another:

Tropical Freeze----Rayman Legends

Hard Mode-----Invasion Levels

Weighty Physics-----Floaty Physics

No Use of Gamepad-----Good Use of Gamepad

Somewhat dated Lives Mechanic -----Infinite Lives 

Fewer but Longer Levels-----More but Shorter Levels

Full 3D background/models-----Some 3D backgrounds/models

Online Speed Run Leaderboard-----Daily/Weekly Challenges + Leaderboards for all stats

Amazing OST-----Great OST (although a lot recycled from Origins minus Music-themed levels)

And a bunch more...

While I felt Legends was a step up from Origins, Tropical Freeze is leaps and bounds above Returns.

Also I had more fun with Tropcial Freeze, but Legends is still one fo the best Wii U games.