mask ques. - single vs multi hose

I'm looking at the Swift. The Comfort Curve also looks interesting. One has single hose connection (Swift) and the other has a split hose connection (2 hoses).

In at least SOME of the APAP literature I've been reading there's reference to some multi-hose setups making it difficult for the APAP to perform properly.

Has anyone noticed this? Anyone got a single AND a multihose mask that they use and do you notice a difference in performance?

I'm asking because I think my mask will be replaced first, but I want to also move up to the REMstar auto with c-flex, heated humidifier, and the software. (That might be a while... out-of-pocket). And I want to make sure if I get a new mask that I won't be having a detrimental effect on the operation of a new machine.

I have both types, on a bipap @ 13-9 and to be honest can't tell a difference in pressure. Some mask feel a little different, but not enough for me to make a change over, or worry about it.