"Same keyword, Same Domain but rank differ on google.com and google.co.in" This question is always arrived in my mind, i searched too much but never find a genuine ans.
This is not a Google question about Google it's about your site Which I am assuming perhaps has a .in thing going on yes? Or is being seen as for an Indian audience from something else you have on site
Ah Well both above you on the Google.in search are slightly more geared towards India whereas you mention Germany so at a quick glance that is something you could look at. This thread is still in wrong section being in the "Google" section though
Those two sites above you are more relevant to indian audience than yours, at least in Googles eyes. Do some targeted SEO.
I thought/think so to but is 3 in Indian Google better to gain on if loss occurs elsewhere (Other Google) is a consideriation to bear in mind when looking at these concerns...
Buying another domain is just not a good idea, instead research the keywords used by indian audiences if your target market is India.
its related to your targets, which region you need to dominate? so, you can optimize your site on it,, every region have different competitor, and you must know it,,