I see, I found it. I didn't know 505 made that change. Odd that they make minecarts the only way to use a rail unlike PC 1.2.4. Also, you can't use Lead to make either rails or carts. Might be why I never noticed the rail changes during my plays because Lead FTW."Minecart" is an item on console. You need it to use tracks.
* Using quick buff causes 2 Minecart buff icons to appear onscreen,
* I can only use rails if I put the Minecart on my hot bar and use it (using R button) near a rail (bug? interacting with rails in the way PC did would be much easier, especially if console had the same "no-minecart-needed" mechanic),
* Lead cannot be used or making carts/rails (tested on Vita only)
Also, note to 505: get all the 1.2.3 stuff (still waiting for my haircut) before adding 1.3 mechanics!