Purchasing an Identical Tank

[MyronGanes]

I have a Faber HP100 I bought a couple years ago. I'm into sidemount diving now and looking to buy a matching Faber HP100. If I purchase a newer one will there be any weight or dimensional discrepancies worth worrying about? Are they all identical anyway? Thanks

 

[tbone1004]

there should not be an issue however this is part of why i recommend to all divers that you buy tanks in pairs as single tanks are particularly annoying to find mates for