Both are good universities as far as MCA is concerned, however I believe doing it from Christ University, though private but being located near IT Hubs at Bangalore will provide excellent career scope and prospects. Christ University has good infrastructure, faculty and residential facilities.

For more information do follow the link below

https://www.careers360.com/university/christ-university-bangalore/mca-course

However, I would personally suggest you to appear for the NIMCET Exam and pursue MCA from one of the Top NITs like Trichy, Warangal, Surathkal, Calicut, Allahabad, Nagpur or Jamshedpur. The institutes have excellent faculty, research facilities as well as a good employer outlook with Top Companies like Accenture, Cognizant, Adobe, TCS, Wipro, Amdocs, IBM being regular recruiters.