Yes!! xactly. turbine is pretty much the same in both the turbo. only the hosusing is different as the HKS one is designed for External Wastegate and the other on has a port for interwastegate. fan size is the same. the complte specs are.

GT3040 Turbo





HKS GT3040 - 500 PS Output

COMPRESSOR:
-Wheel- 50 Trim - 58.0 Inducer / 82.0 Major
-Housing- 100 Inlet / 60 Outlet - 0.60 A/R
TURBINE:
-Wheel- 84 Trim - 60.0 Major / 55.0 Exducer
-Housing- GT25 inlet / External GT30 outlet; 0.61, 0.73, 0.87, 1.01, 1.12 A/R

I suppose this is for both the turbos though the compressor housing and no. of inducer fans are diff. Kindly suggest

 

Ok! i've posted the specs of th HKS turbo charger in my last post
this is the specs of GT30

GT30
Turbocharger part No : 705867-0002
CHRA Part No : 700177-0015
Hsg. A/R: 0.70
Wheel Trim : 56
Model : TO4S
Wheel DiaCompressor) 2.25/3.00
Horse power : 510
Compressor flow *(Lbs): 55
Hsg. A/R : 0.82
Wheel Trim : 84
Wheel Dia(turbine) : 2.16/2.36

 

.82 turbine on the h22, definitely.
on the b16, anything lower than .82 will be best imo.