Galgotias University is definitely a better choice for a BTech degree in CSE. I have friends at both Galgotias and Amity. Based on what I heard about the CSE department at these campuses, it is suggested to choose Galgotias. 

• Amity is quite costly and the quality of education is not on the same level as Galgotias. If you want a good college life and you can afford the hefty fee, go for Amity. 
• Galgotias on the other hand stresses a lot on academics. There are many extra-curricular activities on campus that will help you in improving your overall personality. It also offers an exciting campus life. 
• For CSE, Galgotias has maintained a good placement record over the years. It has tie-ups with many reputed IT companies that work in favor at the time of placements. 

The table below gives a brief insight into the CSE program offered by these institutes. 

So, quality of education, placement statistics all these factors tips the balance in the favor of Galgotias University.