Well, I got my private in an M-4. After about 30 some hours in a 152 over 3 years (having returned to student flying after 40 years), I was fortunate enough to acquire an M-4-210C project. After many months of effort, it (and I) were back in the air. The Maule did take a bit more time to learn to land, but owning vs. renting made a big mental difference, at least for me.
I suspect (having never flown one) that the Stinson 108(?) might be a little more forgiving. It just looks more docile. But the M-4 has always been positively responsive for me. Although demanding attention, it has always responded to any control input corrections and continues to successfully return to a stable condition from any awkward or near-disastrous position I have stumbled into. It seems as long as you watch where you are going, the little Maule seems quite contend to take you there, with no problems or hesitations.
If the M-4 has a 210 or 220 powerplant, you should be good for BC stuff. With an O-300 maybe not so much, but I have no experience with that configuration
I see photos of Stinsons in the back country, but suspect they have the larger engine options. Maybe some Stinson people could shed some light on this. However, a wise man once said...there is nothing like more horse power...especially at higher density altitudes.