I would say they would matter the least as far as matching goes. I have four RSL’s with a JBL bed layer and imo, it’s been fantastic. If there WERE a fault I’d say that the softer tweeter of the RSL’s could provide a touch more clarity, but I’ve been very happy with them. That said, I wouldn’t dissuade you from matching if you’re so inclined, but I wouldn’t say you NEED to. Height speakers do the least work, but imo it’s not a reason to skimp. Same for any speaker really. Imo…