That what I seen too, I think it will stand fine, but with little angle, also
Samsung not sell the extended battery, it's only sold with Korean version on Korea, so the extended batteries (the genuine one) are from that kits. also it's not that big ..1750-2000 not a big difference, also Samsung did made an extended kit for SGS2, so I'm not sure if the do sell them only in Korean kits.
" ... We can do nothing but to see the times go by in the path which God has chosen ... "
Galaxy Nexus "maguro" (GSM/HSPA+) by SAMSUNG
Nexus 7 "nakasig" (GSM/HSPA+) by ASUS