Not sure what model years those are but looking at the tour results between the specialized models it’s all fairly minor.
The venge vias rim is at 204w
The venge disc is at 207w
The venge rim (2015) is 216w
Sworks sl7 is 210w
Sworks sl8 is 209w
That’s not just for the frame, the 2012 tarmac did not have deep section wheels whereas the venge did. The aero gains from the wheels are part of that figure already.
Thanks for sharing, as I’ve always wondered if Tour magazine had tested my rim brake Venge.
For fun here is my Emonda ALR which is used as the reference slow bike in some of these tests, I think around 240-250w in your, vs Gen 7 Madone which was 207w in tour testing and by far not the slimmest front end of all the aero bikes out there.
I still think the overall feel difference is huge between the bikes, the Madone is way faster and always reminds you to push more, the Emonda is perfectly happy to ride under 20mph
did you just rip this from WW for clout on TR?
Or maybe I’m the same person 
well said! same goes for 3-5 minute power