If you look closely at the picture, the major increase in over all length compared to the 055X seems to mostly be from the longer handle. I wish the blade length difference was larger. Here's me hoping for a full 4'' blade.
But when you think about it, it's hard to justify the effort of releasing a dramatically new knife so the blade length can go from 3.5 to 3.75''. That makes little sense. If that's the case, I find that it's a strange decision. Take a look at these proven and classic examples; paramilitary 2 vs military (3.5'' vs 4''), SNG vs SMF (3.5 vs 4''), XM18 vs XM24 (3.5 vs 4'') or Benchmade Skirmish 635 vs 630 (3.5 vs 4'')...etc. Those make sense and make for some clearly noticeable and tangible differences overall. Going from 3.5 to 3.75, really??? The pre-existing ZT0301 already has that same exact 3 3/4inch blade length and even has a long list of other shared features with the 056X. The 0301 is a great knife, but it leaves something to be desired when compared to other 'full size knives'' in it's category IMO. 0301/055X type knives, (possibly 0560 if specs confirm), are really mid-sized ''hard-use'' knives in my book.
I know we are only at the picture stages, but I'm starting to worry that the 056X won't be enough knife to differentiate itself from the already pre-existing midsized, 055X/030X crowd. From the other knives I've mentioned, if you take a look at side by side photographs, they don't looks this close in size to one another.
I'm not bashing this great collaboration design, I might still end up buying it, I just wish the two models were even more dissimilar as ''big'' and "little" brothers should be..