Listen the 7M-GTE is a well designed motor as is the 1JZ-GTE. They both offer their respective advantages. The 1JZ will of course feel faster than a 7M because of the power delivery. Twin Turbo versus Single Turbo. Though the 1J is at 275ish stock and the 7M is at 232 stock. Now remember the Turbo A versionin japan is a factory 7M with 275 h.p. The 7M can create gobs of H.P. as can a 1J. Now I challenge you to go to Toyota and see how easy it is to get parts for the 1J. Very hard and extremely expensive. If I had my mk2 again i would do a 7M-GTE swap in there and you would be set. Be warned you need to make sure the rest of your mk2 is ready for the power. Your used of an anemic 160hp 5M (160ish ft/lbs.). Take a STOCK 7M-GTE and you get 232hp and 256 ft/lb, and dude if your not careful you will slam that car sideways and not know what to do with it. now tell me if you think that is not enough almost a 100 more ft/lbs of torque.. If your brakes, suspension, drivetrain, and tires are all ready for that kind of power then go for it, if not do those first before anything else!
Anyhow, good luck with you decision!
joe