Program size variation for IS 7

I recently installed Internet Security 7 on to my PC (354.00MB)

Also I installed the same program on to my Netbook (424.00MB).

I’m curious - can someone kindly explain the reason for the program size discrepancy?

Program working fine on both PC & Netbook.

The installation size could vary with the logs, reports, dumps (if avast crashed), temporary files, virus definitions updates, languages/sounds. I won’t worry that much.

Thank you.