We dont really know yet bcuz we havent seen the extent of Gin's abilities. Stark did fight Ukitake, Shunsui, Rose and amor without much difficulty...He only lost bcuz Shunsui has a very trickiest Shikai (next to Aizen's)
No way!! Stark is strong but gin, gim has guts and cunnig and raw pwoer while on the other hand Stark only has Power And losts of it but with Gins Miond he could combine his 3 skills and make an AMAZINGLY quick battle,Gin winning and for all the people say we dont know yet because....It dosent matter plus Aizen or someother Arrancar/Soulreaper would come and anihalate Stark.
