DIT University

For sure, MIET over DIT because:
1. better placements
2. better scope
3. good management
4. well to do labs and Infrastructure
5. faculties are great

Hello Dear,
Here is a tool called college comparison app by Shiksha. You can compare any of two colleges. Here is the link:
https://www.shiksha.com/resources/college-comparison

DIT University is one of the best universities for engineering in North India. It has good placement record in all the branches. You have to score more than 60% in PCME and 65% marks overall for this university.

ECE from BIT, Jaipur a much better option compared to CSE from DIT, Dehradun because of various reasons.
The placement in ECE is good enough. The lab facilities are good enough which is very much useful.
The most important point is that the degree which would be given to graduate will be of BIT, Mesra not of BIT, Jaipur as Jaipur is an extension center of BIT, Mesra.
BIT, Mesra is one of the most renowned universities of India.

According to the mentioned college name by you, DIT-Dehradun is a good option for engineering in terms of placement, faculty, infrastructure and laboratory, but it may depend on the branch, please confirm before admission.

It depends on your marks.

Based on ranking, placement records and other criteria following is recommended Institutes for B.Tech CSE in order of precedence: JSS, Amity, UPES and DIT.