Yeah that top section on Red M&M's is tough. I think the crux mid route is a bit more technical, but that bit at the top is more physical.
Either way, I still think that Yodemeister and CTD are tougher. Yodemeister has very few rests at all, where Red M&M's has great rests. CTD is just funky thin, kinda like Red M&M's but with only one crack.
Maybe Red M&M's feels a bit easier because it is not very sustained. But with two distinct cruxes, wile Yodemeister is sustained from bottom to top.