I've read a lot of TWR, but only a little bit of AANW, how do these timelines stack up against one another? Which one is more realistic, interesting, in depth, grim, etc?
Both are about as realistic as a Nazi-victory timeline can get. Both make it abundantly clear that the result is an absolute nightmare. Both do a good job of showing the insane dysfunction of the Nazi regime.
I think that TWR stretches things a little further by having stuff like ancap Norilsk, but honestly, I can't pick a favorite.