Get cross levers, because when you want to swap bars, they will come off with out taking the grip off, and have a wider clamp. On riser bars you will have to make a make-shift shim, If you use a thin layer of tape, its hidden behind the clamp, so u won't see it. That MTB lever is so ugly.

Cross levers are more compact, so will compensate for a narrower bar. And like I said, the clamp opens up, so you don't have to undo any thing in front of it.