Fly By Ya

If I was to buy the b18c5 (R), and planned on boosting w/turbo, would it really be worth it to spend the extra 1,500 bucks, on the type R motor? I mean, the only thing that makes it type R is the pistons and valves and stuff that I am going to have worked to be ready for turbo right?
Im mean, Im gonna have to get a port/polish job, valve job, sleeved cylinders, turbo pistons, rods & stuff....so.....couldnt I get just as much power out of a b18c1 setup rather than the b18c(R) full of stuff that Im going to have to replace anyways?? Aren't the blocks the same???