There are some things about mid-j V3 that I realy like, I think of as more artsy, where V4 can be more realistic and detailed.  It depends on what you're in the mood for.  I've been going back to some of my early V3 prompts and seeing how they look in V4. The eyes are way better in V4 but it still can't do hands for sh*t.  I've had some images that are so just what I want and bam, the six and seven extra, extra long fingers always do it in ha ha ha.  Ya, that sci fi is a mid-j gal Len, she is one of the better ones.  A few with body suits have some strange upper body shapes, so the database still needs some work in those areas.

Also thanks to Sunbeam for getting me to look for some robots of my own, Chomper better watch his back... ;)

Midjourney V4  ar 3:2