I do use SPD-SL on the road, but over the winter I use spd on all my bikes. In my case, I have one set of winter boots, so cheaper and easier to swap the pedals than buy a second pair of 3 bolt boots! I can’t say I really notice much difference on spins (no hot spots or anything), but would caveat that I haven’t raced in them.
Speaking from experience of new spd pedals on the commuter, and a comedy fall, spd pedal tension can be pretty tight too - in the touring shoes I couldn’t clip out even when I wanted too 