Hello Aspirant,

Both of these colleges are considered among the top colleges for engineering in India.

Campus- TKM Kollam is the way to go if you want a good campus life. The campus is huge with beautiful architecture. The infrastructure of the college is also impressive.

However, GEC Barton Hill's campus is also beautiful with a lot of greenery around. 

Academics- TKM Kollam has better faculty members than GEC Barton Hill. Overall, the results of TKM are better than GEC. 

Placements- Companies come to both these colleges to offer jobs. Better placements are in TKM Kollam where companies like TCS, MRF, Byju's, IQVIA, etc. come to offer jobs.

However, placements in GEC Barton Hill have become better over the past few years as the number of companies coming to offer jobs has increased. 

You can make your decision based on the above factors, I would suggest to go for TKM Kollam.

Hope this helps.