u have to compare the 2g/3g/ and 4g networks.. (of indian sim provider and canadian)
also the type of sim card.
example: http://www.gsmarena.com/samsung_galaxy_pocket_s5300-4612.php
look at the 2g and 3g networks.
for accurate answers:: http://forums.androidcentral.com/samsung-galaxy-s3/175597-few-questions-about-international-version.html