Consider Tour magazines aero testing.
I think the SL8 and 7 are within a gnats cock of each other with the same bars and wheels. The 7 may have been faster. Can't remember.
The Factor One (for this you can substitute pretty much all the 'fastest' bikes) is only something like 7 or 8 watts faster at 40-45kph. I say only, I know it's a lot for some but I'm not convinced most of us could feel it.
I'm thinking the R088 ain't a million miles behind an SL7 with the right bars and wheels. I think it's even a little lower depending on the size.
Get a 111 on the front wheel and run it 1x and it'll probably be around the same.
Dial your position in.
At this point the only disadvantage is the motor

Just my humble opinion of course
