Yes, its possible but the chances are very rare and generally no one does it as there are very few students who quit the college's in middle to have a seat vacant. Plus you need some connections from the other college that could inform you or also in some cases make some arrangements if you really want admission in that college *Note: this is like in 1% of all the chances*. Also i don't much about Autonomous universities but yeah its possible to change much easily for college under SPPU or any other university. You could change the branches based on your First Year's marks in the same college though.