Thanks for the info, that definitely helps.
Just FYI, the manfold that I would mate to the GT28RS would be APR's manifold, which has a pretty good reputation.
For the turbo&manifold combo, I think it will cost me $250US more for the GT28RS&APR than it would for the VF34&JS.
My S4 is my mod-car. The Golf is my daily driver that's going to get a big turbo. Otherwise it's mostly stock looking and will stay that way. I don't plan on putting a lot of $ into this car. [it has a LSD, clutch, flywheel, suspension, and boost gauge. It's going to also get exhaust and SMIC.] I don't need it to be the fastest out there, but I do want it to be fun. I drive 140 miles roundtrip to work each day, all highway, so I think this will make for a nice highway beast.
As you noted, if the VF34 isn't right for me, or if it blows, then I'm stuck with a unique manifold. But if I go with the GT turbo and APR manifold, then I have various turbo options, as well as an easy sale of the manifold should I ever part it out.
Hard decisions. I'm happy to know the flow is similar. I like the idea of the VF34, as it's different (I live in the US, btw), but also like APR's manifold. Hmmmm. Thanks again for the info!