Rollover potential of Bobcat CT122 and Kioti CK20?

[Fugowwee]

So went tractor shopping today and the local Kioti dealer didn't have a CK20 said they were too tippy for his liking but that he had a CK30 we could deal on. Sales gimick me thinks! Still looking at a CT122 later and a CK20 and 30 at another dealer it did make me think a bit. Especially as I watched my wife drive the CT122 like a doll on top of a Tonka toy tractor. Is there anything to it? Does anyone know the safe or maximum tilt angle of 20's vs 25/30's

Thanks!