not sure how much (if any) faster they'll be over my Tulas
There's probably 5mm in your elbow positioning which will make more difference, but I'd take the Ventus II because your tall head tube could use the 40mm base bar drop. At that price you've got nothing to lose anyway.
£200 3T Ventus II. Such tempted, but not sure how much (if any) faster they'll be over my Tulas. Finally bought a Tririg Omega as well.