Omicom Skystar 4 DVB-S2 HELP

[cocoh]

Hi...
Does anyone know how is this card?
Omicom skystar4 DVB-S2.....

Iwant to buy this USB.. Omicom SS 4 USB 2.0 (SkyStar 4)

My question are the same?

what is the difference between this and ST4200 dvb-s2?

I saw TT-connect-3650 CI
Which to choose between them?

thank you