Yes, the darker bottle with rough glass has an M on the bottom. The other has what looks like a faint "'ll".Is there any writing on the bottoms of the bottles.
The one on the left looks like it is a tooled top and the one on the right an applied top. Hard to tell with the glare.
The rough texture of your bottle was caused by being blown in to a cold mold, like first thing in the morning or shift change.
It is most often refered to as Whittling.