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I probably wouldn't advise this; as most people suggest that the comfort of an SMP comes from dialing in a pretty finicky saddle angle till you get the right support. Depends how long you have to fettle for the swap over I guess?
I personally ride mine with the main section basically horizontal though, so more like a regular saddle with a full length cut-out. If you went like that it would probably be easier.
Also, what surfaces/bike is it? Composit probably fine on road/tarmac but might prove uncomfortable over rough stuff where you're inevitably going to get jolted by things
The composit feels stiffer to my butt bones. The composit one would say is less comfortable when just trying them out due to this fact. But over time and once you get use to it i think the composit is as comfortable, but it does not feel like it have as much "give" as the forma.
your experience may vary.