Remember about I9003 -> Omap 3, Cortex A 8, 1 GHz , SGX 530 ... without s.amoled
and about I9001 ->Qualcomm MSM8255 1,4 Ghz, Adreno 205 with s.amoled.
Name (I900x) suggest that will be a clone of I9000 (hummingbird, cortex A8 + SGX 540 + s.amoled) but thats not true. Probably some people dont know that SGX 530 is slower than Adreno 205, and that SGX 540 is faster than Adreno 205.
And if someone thinking about FPSE with OpenGL better to have SGX 540 or Adreno 205... SGX 530 is really old chip, something like Adreno 200.... of course i hope that OGL wil be working on SGX 530 and Adreno 200 (I still have HD2 with android)