Hello,
NIT warangal is slightly better than NIT Surathkal in terms of placements. The highest package at NIT warangal for 2018 was 39lpa and highest package at NIT surathkal was 36.7 lpa. Both are stunning packages. You can absolutely choose any of these now. Because the placements rate is growing at NIT surathkal too. 
Good Luck!

Hello aspirant,
I am here for helping you...
As per your doubt I am providing you a link below where you can compare your mentioned colleges and can see their rating, ranking, recommendation, people feedback, placement etc.
I hope this much will be sufficient for selecting a best college among your mentioned ones.
Link is given below:
https://www.careers360.com/compare-colleges
I hope it will be beneficial for you....
For more queries you can  upvote my answer and can ask in the comment section below...

Best of luck...

NIT Warangal

Admissions Courses & Fees Cutoff Placements Reviews

Shortlist

Brochure