hello...like to ask if there is any difference in AF & KLM long-haul Y? ..specifically CDG-SIN on AF compared with AMS-SIN on KLM?

they're the cheapest way to get to SIN from LHR. some of my friends find AF quite ok. i'm going to try AF next week.

anybody with info about KLM? how does it compare inflight, punctuality, transfer at AMS?

thanks!!