I have had a hybrid turbo and now the gt28rsr. The hybrid comes on very strong and in a big surge around 3k then keeps pulling smoothly.
I brought the gt28rsr as people said they come on smooth (better for my clutch), but in my car it comes on like a switch

huge surge then power upto 5.5k then another smaller surge and it races to redline.
The hybrid is a very good turbo and the cheapest way to get 250-300 bhp (exhaust etc stays the same)
The gt28rsr is the better turbo but you need 5 stud downpipe (or adapter), new oil feed pipe and restrictor, possible sip (inlet is 3" where as hybrid is 2 1/2 ") and i think its cost around £1000.
Ash