So, after playing with this a bit I came to a conclusion that B1 MB Grave Rot > 112 combos but not because of the cancel advantage MB GR gives you. I think it is because when activated really close to the opponent MB GR immediately does damage which combos into 112. I noticed that when going into B1 MBGR Trait reset my opponent sometimes was escaping it. But that doesn't make sense because the B1>Trait Reset is guaranteed and cancelling into MB GR is suppose to give you more advantage. When I am touching the opponent and MB GR starts hitting, it actually stops the stun duration of B1 and, as it has no stun of it's own the opponent is actually able to jump out immediately. And If you think about it B1 is a stunning normal which ends the combo, the mechanic is similar to Johnny Cage's nut punch (except that it is a special
)Nothing can combo after that no matter how much advantage it gives, BUT the combo continues due to the unique properties of the Grave Rot. It just gives better understanding. So for the Reset after B1 MB GR into Trait you have to start B1 with a little distance between you and your opponent so that when MB GR starts, it doesn't hit him before you go into Trait - and than the Reset is inescapable. But in a combo situation on the contrary you want to be touching your opponent during the activation of MB GR.