(1) MHT CET 96.47 percentile and JEE Mains 89.10 percentile – can you get admission in KJ Somaiya College of Engineering (KJSCE)?
Yes, with 96.47 percentile in MHT CET and 89.10 percentile in JEE Mains, your chances of getting admission in KJSCE are good, especially in branches like IT, E&TC, Mechanical, etc. For CSE, cutoff might go slightly higher, but you still have a fair chance depending on the branch preferences and category.

(2) You submitted your form for all specializations – is your admission possible?
Yes. Since you have applied for all branches through KJSCE’s institutional quota form (from their own website), you are already in their admission process. If your merit rank fits in their cutoff during rounds, you can get admission.

(3) What is the difference between KJSCE and KJSIT? Which one is better?
KJSCE: K. J. Somaiya College of Engineering
KJSIT: K. J. Somaiya Institute of Technology

Both are part of Somaiya group but KJSCE is autonomous and located at Vidyavihar, while KJSIT is at Sion and comes under Mumbai University.

KJSCE is considered better in terms of ranking, placements, teaching quality, and student crowd. It is the more preferred option.

(4) You applied for KJSCE from their website. Does KJSIT also need separate registration?
Yes. KJSIT admissions are done through the CAP round (MHT CET CAP). If you have already participated in CAP, you can get KJSIT through the CAP itself.
But KJSIT also sometimes opens its own institute level admission, for which you may need to register separately if you want to try that.

website links:

KJSCE admissions:
https://admissions.somaiya.edu/

MHT CET CAP site (for KJSIT through DTE Maharashtra):
https://fe2024.mahacet.org/