Wink 4.4 update questions

hi people

I have had a htc one and i updated ages ago to kit kat on three network, but not so long ago i broke the phone replacing it with the htc mini which I'm very pleased with as i prefer the size. Only thing is i brought a girly blue mini as it was a good deal for 200 brand new, it was unlocked and updated when i got it. today i found a deal on a brand new silver white version which i do prefer and pleased i brought it, but it was locked to EE which i unlocked for 2.50 from ebay what a deal.

I been trying to get it updated but found out EE haven't even pushed it through yet, can i flash this phone with a uk three Rom??? is this available??

Are all the phones the same apart from the custom network firmware and rom????

cheers j