I believe those are the original Kh-55's. The Kh-555's only entered service in 2004 and I think I scanned those pictures from the late 90's magazines. Any Kh-55SM's without saddle tanks would instantly be just a Kh-55.
That is the thing... the saddle tanks actually look like they are attached... ie bolted on... they don't form one piece with the rest of the missile they actually look like a conformal added fuel tank to essentially make the shape of the missile triangular.
I would assume the Kh-555 could be fitted with saddle tanks or not fitted with saddle tanks depending on the range to the target in question.
I don't even know if the saddle tanks on all the missiles that carry them can be jettisonned when empty to reduce drag and RCS...
The NK-32-02 engine is a modernized version of the standard NK-32 engine for the Tu-160, and is developed and manufactured by the Samara PJSC Kuznetsov (part of the PJSC United Engine Corporation of the State Corporation Rostec). The NK-32-02 is supposed to replace the NK-32 engines on the Tu-160 combat bombers upgraded to the Tu-160M version (a total of 15 aircraft are supposed to be upgraded), and should also be installed on the new Tu-160M2 bombers (a total of 10 aircraft have been contracted) ...
I find it crazy that the TU-22M3 uses a different engine that is a similar size and similar thrust with similar fuel consumption but it is different... and both aircraft are Tupolevs so it is not like it is a rival company using an engine from a different engine maker.
They were planning to upgrade the Tu-22M3M to use the NK-32 engine but I think Vlad said they changed their minds... but I can't remember if that was for the prototype M3M or for all of them.
Modification would mean an extra 120 engines could be used on the 60 upgraded planes... and the older NK-25 engines could be gradually retired.