need input on Genotropin 12mg and 5.3 mg

[IRAQ]

Good morning Guys

I'm going to hop on cycle using HGH but this time i will use Genotropin and my source have 2 kinds , 12mg and 5.3 mg

i want to know the difference between them , and which one will works better

Pfizer - Goquick 12mg and Pfizer Goquick 5.3mg

and whats the dosage for both to use