Thanks a lot for your response. Interesting to be able to understand the evolution of each line.
Yes I have checked the sounds list it's a bit hard to tell.
I know they released a separate M1 pack as an addon (I don't need because M1 VST).
There was this lenghty and technical reference about EDS but it doesn't say really:
https://sandsoftwaresound.net/innards-krome-kronos/
For now, I will consider the Krome EX to not have much affinity with the Triton which is a good thing.
Some folks are saying it sounds like a Triton but this may seem a bit of a stretch.
It really looks like the samples are coming from another lineage (to your point M3 etc..)
Hope I am right. I might be pulling the trigger soon.