This is what I have.For what it's worth, I have found the SDG Bel-Air 3.0 brilliant, in fact I never think about it because I have had no issues at all. I am a skinny lightweight though YMMV
After a few months of using the stock Merida saddle I just couldn't cope, so I moved to a Bel Air 3 and haven't looked back.
It's the best saddle I've ever had and I have been through a lot of saddles in my 207 years on this earth.
Looking at the differences, I could be keen to try a Bel Air Max, though - looks more e-Bike appropriate.