Hello Pepe, 

Out of GEC Barton and TKM Kollam, GEC Barton is way better than TKM. The reasons are:

• REALLY GOOD FACULTY MEMBERS 
  
• GOOD ALUMNI 
• BETTER FACILITIES 
• AND THE LAST BUT NOT THE LEAST, THE PLACEMENTS ARE REALLY GOOD AND WAY MORE BETTER THAN TKM.

So i would recommend you to join GEC.

I hope you will find my answer helpful. 

All the best.