Mahomes or Lamar rest of season/keeper

I have them both and I want to deal one before the deadline. End of season THIS year Lamar has a much easier schedule. But long term IF I were to keep one which would be best? I guess it’s a question of is Lamar legit or will the league catch up to him. We know what mahomes is and that’s a top 5 qb 2 years in a row. Or should I not even worry about the keeper and just try to win this year with Lamar and try to get a big piece for mahomes

if you could really get a haul for the prospect of mahomes. ship him out and keep lamar for this year.