I have and love them all (in different sizes).
Since you prefer a semi-stainless, at least, I think the superior facets of the full carbon Mori are not great enough to weigh over the other three. Furthermore, there are a few "Mori 210 gyuto(s)": AOS, AO-2, AOS-Damascus.
Kanehiro: By far the heaviest of the bunch, but still most likely lighter than anything you're used to. By far the tallest of the bunch @48mm. The knife has a blade heavy balance that might take some getting used to for you as it is very unlike the knives you're probably accustomed to (Wusthof, Henkel, etc.). Extremely strong feeling
knife... a real workhorse. The transition from naked AOS to stainless-clad AOS just below the shinogi is what you're recognizing as a hamon, but don't worry as the AOS takes a beautiful patina that is just as hot. It is my favorite of the four 210's. I honestly can't even use the others as gyutos because they're only around 42mm tall...
Konosuke: I LOVE HD STEEL! Oh, I'm sorry for yelling. No I'm not, I LOVE HD STEEL! It's just awesome... period. Why do you think they sell out so quickly. Well, worth the wait. I have two on order since June! These knives are super light & super thin which will take getting used to, as well. I find it takes a bit more to sharpen then the Suisin. I also find its edge to last slightly longer.
Suisin: There is something about a Suisin that just... connects.
I have never spoken with a Suisin Inox Honyaki owner of whom wasn't absolutely in love. I won't say much more because you'll learn I'm a bit crazy, but the Suisin is a very special knife. Yes... I love the HD steel, and yes... no knife in my kit takes a sharper edge then my Kanehiro AOS, and yes... the rustic carbon of the Mori has a dear place in my heart, but the Suisin, I must say, has the most natural & organic overall feel. I just connect with them... & well. There is this je ne sai quoi... just something, I don't know what. The closest most natural extension of my hand from any knife in 23 years as a Chef.
Have fun... they're all awesome in their own ways.