Reply to Questions with higher end CDJs, Rekordbox, and looping...

Two questions. First one: I have CDJ 350s and looping can be tricky; gotta have good timing. With higher end models (850s and up), is the looping a bit easier? By easier I mean do the CDJs act more accurately in terms of the looping feature, maybe compensating for a slighty off beat loop. Second question: How does the looping system work via Rekordbox? I know you can save loops on songs in the Rekordbox software, but how does that translate when playing a track in a set? I hope I'm making sense. Thanks!