Import Tuners latest issue has SP Engineerings R34 GT-R, and R35 GT-R in a comparison. Not a real test, unless you count racing the dyno a test.
I wouldn't really compare a twin GT35 RB26 to a VR38, as they are two very different engines. The VR makes a ton more torque down low than an RB,and the RB revs out much higher.
Carter, the editor of Import Tuner is a Motorex R33 GT-R owner, so get out there support the issue, buy it off the stand. Thank you much.