In my understanding, the mig weld would be more brittle and break easier.
This can be true. A MIG weld done wrong -OR- a bird-poop stick weld? Which is weaker? A bad weld is a bad weld. A good weld is strong. It's about that simple.
A problem with spending along time slogging thru the stick-weld phase - you will put bird poop on LOTS of your stuff, doing poor repairs, messing up and scabbing a lot of your stuff for a long time (unless you have good help). With MIG, you can learn to make good welds and good repairs a lot sooner. And your eqpt will be repaired and serviceable a lot sooner. MIG is as a much more productive machine.
I've been learning to weld. Guy that is teaching me told me to start with stick because MIG would be much easier and stick will do thicker and dirtier stuff...like rusty farm equipment.
Lucky you have someone to teach you stick. It's more than just a curiosity or a sport, you may need it someday. But maybe not. There's often a statement about welding dirty or rusted items being better with a stick welder. This CAN be true, but 18volt angle grinders have also been invented, and weld preparation gets a lot easier without cords. In general if you don't have an 18v angle grinder, you are behind the curve in that case as well.
Now I think those are jobs I can tackle with less fear of screwing up my equipment.
I see the value in stick welding. I like the challenge of learning stick welding. I plan to keep practicing.
However, I'm VERY glad I tried MIG welding with my machine!
What a blast!
This is the reality. Stick has its place but there is a REASON you can find stick welders dusty in a corner of the shop. Because MIG does most of what people need, far easier and better, faster, more success and looks better too. Lots of stuff breaks because it's thin. Consequently it's too thin to stick-weld, thus an item easily repairable by a newby welder is "un-repairable" even to a veteran stick-welder (= scrap). It's so EASY to MIG weld you just repair the dang thing and move on.
Also a lot of people make their stuff too thick and heavy, not because it needs to be that heavy but SIMPLY because they can't weld the material thickness that's appropriate for the project.