I have both and i just compared them using a Volvic L53 ball, an orphan ball. This was on Kiawah #10 with a 3-5 mph tail wind @ 2 o'clock.
4 shots each club, full BS using Mulligans and all groups of shots hit in as close to the same spot as pissible:
1 Shot each Slightly left of ding:
SLDR 293 yds Carry, 298 total yds Elevation 117 ft
Vapor Fly Pro 293 yds Carry, 301 yds total Elevation 123 ft
2 Shots each on the Ding:
SLDR 285 yds Carry, 293 yds total Elevation 112 ft
SLDR 288 yds Carry, 298 total Elevation 112 ft
Vapor 290 yds Carry, 302 Total Elevation 123 ft
Vapor 291 yds Carry, 302 Total Elevation 123 ft
1 Slightly right of ding:
SLDR 291 yds Carry, 298 Total Elevation 117 ft
Vapor 297 yds Carry, 305 yds Total Elevation 124 ft
I chose to hit 2 shots on the ding each because I didn't believe the figures I got for the SLDR with the first shot. I thought it was a fluke the first time
Since both are 9.0* loft I was surprised to see the Vapor Fly had higher elevation..
Hope this helps.
phred952