Where to apply for a master's degree in St. Petersburg?

Question

IT education

I want to enter the master's program in St. Petersburg. He himself had just completed his undergraduate studies at his rather good, but provincial university in the direction of "Informatics and Computer Engineering".
I choose between ITMO, St. Petersburg State Polytechnical University, St. Petersburg State University. The bottom line is that in time I will have time to go to a maximum of 2 entrance exams, and if everything goes badly I will go home, where my master's program has already been arranged.
Comrades, tell me where it is better to do, where it is easier to get through, where it is more interesting to study, etc. How are these exams done? In general, I will be glad to any advice on this topic.
P. S.
A little about myself - never a fool, the last year at my university I studied only excellently and generally did not experience any difficulties throughout my studies, self-taught, I decided to try in St. Petersburg, because it seemed to me too small at my university.
P.P.S.
Yes, I know there are more than such questions, but most of them are already many years old and they are about undergraduate studies.