quick guide
VF22 - 350-370bhp but laggy and v.fragile, doesn't make good torque.
VF23 - 330-350bhp, in between vf22 and vf24-29, nice smooth, good topend.
VF24 - 320-340bhp, spools great tails off a bit top end
VF28 - see VF24
VF29 - see VF24
VF30 - 340-360bhp, similar to VF23 makes more torque
VF34 - 350-370bhp, similar to VF30 but stronger thoughout - best VF IMHO.
VF35 - 330-340bhp, excellent spoolup, good torque, weak topend unless everything else is perfect.
TD05-16G - 340-360bhp - I had 383bhp and 369lbft on my own car at Prosport, tough as old boots spools well with fantastic torque.
TD05-big16 - 350-370bhp - as 16G but more topend.
TD05-18G - 360-380bhp - more of the above IMHO the best turbo for a 2.0 road car!
TD05-20G - 380-400bhp - looses out on torque but get more topend on a STi with 8K rev limit.
MD321H - NOT L/M/S/T 321H - 400bhp.