I think this drawing was made by M1 because of the font used in the dialogues. And talking about copy-paste. In most of his comics, some panels use the same base picture with minor variations. I've noticed that M1 has 2 different drawing styles: gray scale aliased drawings made in Paint with a tablet (post #7541,post #4783, post #6961, post #3884) and thick black line drawings (post #7796, post #7420,post #3283, post #7330). Maybe the artist is experimenting with other drawing styles.
The font's similar or even the same, but can't they be both just be using the same font? Tons of people use Comic Sans, Arial etc. I think that's a very weak evidence.
Oh, I made a mistake, he does use copy paste... in sequences of frames, when the next is based on the previous. Let's just say it doesn't look like his style to me, at all.
I'd sooner believe the pigdisgusting-fat-yukkuri-mspaint-guy took drawing classes and then drew this.