Galaxy S3 or Galaxy Nexus? (T-Mobile)

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http://forum.xda-developers.com – I have a Galaxy S3 in the mail from Tmobile right now, got it for under $200. Thinking of selling it and getting the Nexus unlocked from google. Now, I know that the Nexus's hardware is a bit behind the S3, what are some other differences in both phones? I'd like to hear it from people on here that actually used the phones and not some BS reviews on the net. What would you do? Thanks everyone. (HowTos)