I was wondering whether are there big differences between PT-76 Polish and Russian kits?

I want to build the russian one but currently I can get my hands only on a polish one.

As far as I see, the turret hatch is different, but it can be solved since the original "double" hatch is also included in the polish kit, Other difference is the machine gun, but I don't have to put it on.

Any other difference? Hull?

Thanks a lot,

Adam

some pics for inspiration

http://www.massimocorner.com/afv/Surviving_PT-76.pdf

http://svsm.org/gallery/PT-76?page=1

and if you know russian, or have a translator

http://army.lv/ru/pt-76/2054/3817

check past post on the subject, they may hold the answer