For those still interested in "the second jet":
The Grey Zone and another site are showing an aircraft RA-0274B which is a Russian-registered Embraer E190 (the base of Lineage 1000, their largest, longest range business jet). Other things remaning equal why would not Prigozhin be in the largest, more comfortable airplane? What were there two? What really happened to the other one.
Regardless of the outcome this one seems to be 100% Mafia-style intrigue and misdirection. Russian instability might actually be rising.
I have no idea what is true or not, just that this is amazing.
FWIW the Legacy 600, the one shot down, si one fo the world's most robust business jets. One was in a mid-air collision in the Amazon with a Boeing 737. Both survived, with no injuries but the Embraer did not even have major damage. They are very popular in Russia due to their robust qualities and their less expensive purchase and operating costs compared to the competition.