Running XT at this time is equivalent with running Core. It's the same network, and the same Bitcoins. At some point in the future, if 75% mining majority is reached (but not before January 2016), the network will split whenever a miner creates a block larger than 1MB. This will not be accepted by Core unless they adopt a large blocks patch, but will be accepted by XT, and at this point there will effectively be two chains.
Tor blacklisting is not mentioned and it's worrying as this feature has direct effect on privacy.
With help of XT you can initiate special ddos attack which will block TOR IPs and force users to use clearnet and reveal their locations in order to use bitcoin network. This helps NSA, CIA and other entities to locate users.