GS II Mini is out in Russia only as of now

. And that too at a pretty high price when directly converted.
As for OX2, UI was laggy on the pre release unit. Am sure LG and nvidia must have sorted the problems out by launch time. TMobile G2X is essentially the same phone, so the retail unit of OX2 should be fine.
If OX2 becomes available for 27K, its a better deal than SGSII at 35K+. But if SGSII comes down to around 30-32K, it becomes a lot more inviting offer than OX2.