It depends,'21 for the right price maybe.. t2t brace and swiss steel outdrives are the highlight difference, and they will cost a good penny to buy. But availability comes into play for the rig during these times as well. Me,if the '21 is under $350, I'd go for it. Otherwise I'd wait for a '22.
Also, depends on your use..hard bashing will be better handled by the '22. I've found my '21 on 6s is eating up the diff cups pretty quickly,more so than I'd like..but the t2t brace is a non issue for me since I mainly run on a track..not needed.