Okay, since it's obviously too difficult for some of you to understand let me spell it out for you:
The OP asked, and I quote
besides the fact that the T-Mobile one is black which I would prefer. Is there any pros or cons to either one?
Now I dunno about anyone else, but I'd say that flashing an unofficial firmware and invalidating the device warranty to get round the carrier's anti-tethering policy is a pretty darn big con, no?
If you put metro pcs firmware on a t mobile s4 guess what you have. A metro pcs s4 thru and thru.
No, you have a T-Mobile S4 with no warranty that may or may not work correctly on MetroPCS. Again with reference to the OP, that might be considered a con rather than a pro.
I'm sorry, did I miss the memo appointing you to a staff position here?
Until then you have NO say in the matter, so I'd advise you to be more circumspect with your choice of words.
This is the the second time a moderator has had to intervene. A third will result in forced timeouts for all those responsible - no excuses accepted. Everyone here is aware of the standard of behaviour expected of AF members, so please comply.
If any clarification is required, please contact me via PM rather than posting here. Let's stick to the OP's topic.