A58 is better in every way has a bigger EVF which is a OLED ,has a better sensor ,faster burst rate ,better battery life ,in built IS and lots of other Sony features like sweep panorama etc.
As far as lens availability and accessories every lens is available in india .And in selected stores which have the alpha studio like in bangalore Sony Kormangala one can even try out the lenses including a 70-400g,70-200g and 70-300G and Carl Zeiss lenses like i did on my camera.Every camera was also on display including the A37,A57,A58,A77 and A99 and even the the RX1 and according to the Sony officials its going to be the same story in other cities as well where selected stores will have the entire range on display.