I have friends from both Tezpur University and SLIET Sangrur. Based on the conversations I had with them, I will say for CSE TU is far better. 

• The CSE department of Tezpur University has a great faculty base. It is definitely better than SLIET.
• The university focuses on practical approaches rather than theoretical knowledge. Apart from this, it provides an amazing opportunity for students to work with the Government of India-funded projects. 
• The placements at TU are any day better than SLIET. According to the recent placement highlights the average CTC offered was between 3.5 LPA-10 LPA. 

So, TU is better than SLIET in all respects. It is in fact the best option to do CSE after IIT-G.