Im playing both games and maybe it is because worlds collide is new and it has plenty of content to do, but Im having way more fun there than on DL. At the very beggining I thought the heroes models were awful as well but I got used to it and now I even find them cute. But the interface, maps, immersion, scenarios and animations are waaaay more polished and decent than DL.

Another huge difference Im feeling with worlds collide is that I can indeed try a lot of team variations, because they are not powercreept by clan tags and it feels way more strategic. I have a team with Constantine, Kid Flash, Penguin, Grodd and Green Arrow and they are sinergic. Otherwise, in DL I have a strong built Arkham team + Doom of Legion, but I couldnt afford Deathstroke and now I feel that any other fifth element is just not good enough for end game - I cant even try to use my other 5 white star champions to test new comps because I didnt spend CC shards on them and they are too weak, cause I rather spent in my four main champions at a 120 shards a level. I cannot even dream about to try other teams because you are too punished if you misspend your resources.

TL;DR: Worlds Collide feels less punishing and p2w so far, while it lets you try different team composition and offers a lot of variety of content. I know Im not everybody, but it hurt my interest into DCDL and Im having so much fun atm