I saw the pilot this summer and watched the new version last night. They made some minor tweaks here and there. Nothing major, but the bigger changes I noticed was the fiancee character is played by a different, more manly actor, and added 2 short scenes where Sarah and John had a one on one talk with the Rivernator.
I also realized that I actually kind of liked the first bad guy Terminator in Sarah's dream. He seemed like a bulked up Liam Neeson. I'm glad to have noticed this time around the other Terminator had his head blown off when he got blasted at the end, so I think we're rid of that dude and we'll get a different actor, hopefully. Probably not such a great idea leaving around Terminator parts, super BFG gun, and a time-travel machine lying around after they left though.