On comparing you will find both of them upto marks. If you will look for educational parts SKIT is much better than Arya, it has better faculties. But Arya has better campus lifestyle than SKIT, as it conducts many Cultural and Technical events. Also placement percentage is almost same.

Furthermore for your own reference you can use this link to compare these two colleges and can note down the differences: https://www.careers360.com/compare-colleges

Hope this helps you!!