I do not uses spoilerons so will not comment .... however in the interest of terms..... "Spoilers" are used predominantly on sailplanes to reduce lift. In the model world....Instead of say 30 or 40 or 50 to 1 glide ratio, when deployed you now have 10 or 15 to 1 or less... and this is the important part... with little if any increase in speed. they can be flaps that raise "up" at the wings highpoint.. or a "fence" that rises up veritcial from within the wing, etc. The nose does not drop but rather the plane descends parallel to the ground but say at a 60 degree slope. They work differently on different models. Spoilers are very handy for small fields surrounded by high trees for example. Deploy once you clear the trees.. lose altitude quickly, retract back into the wing to allow normal flow (with a bit of recover time which needs to be experimented with) and resume normal glide path to setup for landing. it doesn't take much spoiler area to disrupt the air flow over the wing. This is how I used them anyways on everything from the Pierce Paragon to a gentle lady back in the day.

Today spoilers are generally no longer used except on simple Rudder, Elevator setups.. Crow, or the raising of ailerons and lowering of flaps is used now and this makes tremendous speed brakes.