OK. I see from the MS data sheets that there is a small difference. Ilford include a water softening agent similar to 'Calgon', and Kodak has added some 'Boric Anhydride', presumably as a buffering agent. This makes Kodak's current formula closer to D-76b, I would guess.(posted 8185 days ago)
They're still both fundamentally the same M-Q Borax developers of yore, though, with my vote going to ID-11 as having the edge on 'authenticity'.