Stalling for a snap is airfoil, change the geometry and change the AOA required for a stall. Wing loading will just change the speed at which that happens (the way I understand it anyways).

But back to the lightweight in the wind thing, I have made many models that were mostly identical but different weights (not on purpose but that was the result), guess what when it got windy the lighter one was far easier to fly than the heavier one. Lighter models can accelerate faster, decelerate faster and require less throw to get the same result, this makes things much easier for the pilot, especially in the wind. Why do you think all the current fancy pattern models are shooting for 9.2 lbs etc?

I used to fly a 10lb Vector 2 meter model, now I have a 9lb 2 oz ZN Line Evolis, the Evolis is unbeatable in the wind compared to the Vector which was a handful to fly in more than 20 mph winds. I dont beleive that you can get an airplane too light.