Flying Blue (Air France, KLM, and Other Partners) - Air Europe vs AF/KL C class

I am gonna fly to Lima and i was wondering which one of the 3 has the flattest seat in C?I know AF is more flat then KL since the use the newest seat on the flight to Lima but i was wondering if anyone had any experiance with Air Europa?

I looked into this a while ago and Air Europa does not have flat seats. Unless things have recently changed, they have very old style biz seats. Plus AF will have much, much, much better service and support in case things go wrong.

Reported here http://www.flight-report.com/reportage/1382/EZE-MAD.html (in french) No flat seat on UX

I've heard recently that UX has updated (or is updating) its longhaul product, thought I do not recommend to take a flight with it choosing between UX and AF (even UX has very little taxes). I flew MAD-TFS (3h) and the service was so poor, meal is cold and FA didn't care of smiling or caring about pax at all. It's a standard for Spanish airlines, as I feel.