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.