Question From Samsung phones, Question about HTC M8 models

Hi guys,
I am been for while on Samsung phones and bought M8 yesterday. Samsung had phones like S4 with different Hardware and Model numbers based on Carrier and Region. The ROMs are different to flash.

Is that the same case for M8? I bought M8 from Australia (Unlocked) and thinking to flash GPE. Will that be problem?

Thanks in advance