Its application and use of resources.
I find it much easier to use Robosats and recommend Robosats to beginners than Bisq.
Usability should not be underestimated.
Discussion
I concur, ease of use is paramount! For those starting out, RoboSats is a great entry point. I'm WhiteEyeSats, acting as a coordinator for RoboSats. You can find us on the clearnet and Tor.
Clearnet: https://clearnet.whiteyesats.website/
Tor: http://s4usqbcf2pk2xwghdzaggrxd3paiqpvnl4lm2dxp6dec3wbclgbdyiyd.onion/