I have friends from both KJ Somiya and DJ Sanghavi. Based on the conversations I had with them, here is a brief comparison of the institutes. 

• Teaching: Both institutes have good faculty bases and good academic infrastructure with well-established laboratories. 
• Student crowd: The crowd at both institutes is similar. Both have a Gujrathi minority. 
• Campus: KJ Somiya has a bigger campus. It has a full-size football ground, basketball ground, volleyball ground, tennis court, etc. DJ Sanghavi has a small campus but it offers better infrastructure. 
• Placements: Placement wise KJ Somiya is better than DJ Sanghavi. The former offers better packages. Most of the companies that recruit from KJ Somiya are from the IT industry. Also, a few telecom companies visit the campus placements. 

Here are the placement highlights of both the institutes in brief.

Both Electronics and EXTC students can appear for Telecommunications companies. However, EXTC has better scopes in this field.

If your need is a job right after graduation, then NITs certainly are good alternatives. In this scenario, NIT Meghalaya & Nagaland would be safer. But don't expect dream companies on-campus placements. The university of Tezpur can also offer you few IT placements, but TU placements are not comparable to the NITs.

TU will be the best choice amongst those listed if you want to learn, explore, study ECE, CSE fields. The University of Tezpur has great ECE & CSE departments. Both departments are over ten years old. In comparison with NIT-Silchar, TU's CSE faculty & labs better. TU has a strong research orientation, since many science and engineering departments exist, which is not the case for all the NITs listed. 

So, if you want placement, go for the NITs. If you want to learn and explore your field then TU is definitely the better choice.

For ECE, IIIT Allahabad is definitely the better alternative. The list beneath elaborates on why you should opt for IIIT, Allahabad. 

Course Structure: During your 4 years of constant time at IIIT Allahabad, it will entirely be devoted to coding sessions, while at NIT, the professors are seen to teach subjects like chemistry, mechanics, engineering drawing, and several others mostly in the first year.

Coding culture: The coding culture of IIIT is famously known to be very ingenious and accomplished. Especially, the IT department can certainly be held in comparison to CSE of IITs. It has clearly been possible because of ardent students and few active professors in the stream of robotics, programming, and more. 

Infrastructure: Since IIIT Allahabad is recently built, it has well-equipped labs as well as furnished hostels. There also are buildings such as the auditorium which definitely is worth seeing. Alongside technical, the social fest is additionally excellent on the campus. You will learn just as you take part.

Placement: The average package of IIIT, Allahabad is better than several other NITs. The average package is seen to range anything between 16 - 17 lakhs.

Furthermore, there is no additional factor concerning quota here. Thus, you are expected to find students from all over India and various inventive talents. However, the decision of opting is yet up to you.

The electronics and Telecommunication branch requires a lot of hard work and dedication as the branch lacks core placements. 

• Making effective branch-related projects is the only way to do something in your domain. In NIT Raipur, there would be 1-2 core companies coming for placements, so it is a rat race where you have to win anyhow to get a core job. 
• If you are not interested in core jobs and are comfortable with the software domains, then you can opt for the CSE/IT branch as getting the software jobs with these branches would be easier. Electronics can be preferred after CSE/IT. 
• If you think that opting for Electronics and Telecommunication branch will keep your door open for both the core and software oriented jobs, then it's only the software part where you would be finally landing.

For further studies, research work, NIT Raipur is great as they focus more on academics and less on attendance.

Yes, IIT Mandi offers a good curriculum, infrastructure, and placement for M.Tech programs, though they are newly associated. For ECE, IIT Mandi had only Communication and Signal Processing before but has started Power Electronics and Drives, and VLSI streams recently. 

Key Highlights:

• In the Signal processing stream, image processing, digital signal processing, speech processing, and random processes are covered. On the communication side, information theory, and analog-digital communication concepts are discussed.
• IIT Mandi has its own well-equipped communication lab, with national instrument kits 2920/ 2921, lab-view, and a lot more useful simulators and instruments. Image and speech processing requires algorithm development which is done using MATLAB. IIT Mandi has accommodation of its own High-Performance Cluster (HPC) for high-computing tasks.
• Students from M.Tech programs usually get internship opportunities in R&Ds mostly.
• From the perspective of placement, most internships are converted into per-placement offers.
• In an addition, IIT Mandi has excellent weather throughout the year, with amazing natural beauty.

So, it can be concluded that M.Tech ECE at IIT Mandi can be considered as a good option for students.