I'm not sure if anyone has mentioned this yet. NWC's new website now states "Cold Hardy Bud 118 Rootstock" . Since I been on this site there has been speculation , and people mad or put off that NWC wouldn't tell them the rootstock. Hopefully this info helps.
MM111 and B118 look different. MM111 is greyish brown bark and gets green leaves. B118 is purple/brown bark and red leaves. P18 can be a brownish yellow green bark. Not necessarily easy to tell after a few years but you might be able to before you plant a tree. I wouldn't be able to tell MM111 from M7 or MM106.
I have been one of the guys who had a problem with not being told what I was paying for and expressed it here. There was no reason not to tell people what rootstock their trees were on, at least I couldn't come up with a legitimate one. Glad they started sharing it, a lot of guys like the trees and they sound like a winner. I have some that I grafted last year, anxious to see how they do.
I wasn't planning on ordering more trees...but gonna give them a try. Ordered 5....seems most have liked the quality. Blue Hills is also sending me stuff this next year as well....I gotta get a few more spots cleared LOL
Knowing the rootstock, I am more comfortable buying from them. I bookmarked their website, but it seems will have to wait until 2022 to get any of their crabs. Good for them, I am glad they are doing well.