The objective here is just to estimate which piece is more valuable?
It's probably B > A, but not by much I don't think.
The "wait 2 turns" clause on B is basically flavor text in games between skilled players (or at least in games where nobody gets surprise-Angel-mated).

One reason I think B>A is based on user statistics: we have Demon++ as a decent proxy for A, a piece which is eminently fair if for no other reason than its lack of use by players > 3000 rating other than myself.

Also, the longer reach of piece B makes it more difficult to prevent its forks with minions alone, since the vast majority of minions only control one square ahead of them. You therefore have to advance your minions to pre-emptively ward off a piece like B, which invites the opponent to start knocking holes in your formation with his own minions.

Piece A does have one advantage over B: from the back row, A jumps onto row 3, which is a safer vantage point to attack forward than row 4 where B lands (see my previous post comparing queen-4 to queen-5 in the K-to-Q thread). Also, Knight jumps are tighter and easier to maneuver with than Camel jumps.

Nonetheless, I would expect B>A in overall strength: perhaps 17-ish for A, 18-19 for B, although 19 seems a stretch if Queen remains at 21. I would probably value Rook+Nightrider as >= Queen, however (although any Nightrider piece in CEO would need to be teleports-only beyond the initial (2,1) jump).