A bit deceptive. I ONLY run 10% in all of my 2 and 4 stroke engines except my YS, it likes higher nitro. Nitro isn't even really necessary for our engines, but they produce a bit more powewr and idle more reliably with it. Many countries generally don't use nitro fuels due to costs. (The higher the nitro content of the fuel, the more fuel your engine will burn.)

Cj,
Pretty much any of the glow fuels will work fine, (as you suspected, there's no difference except oil and nitro content), but I'd check to make sure there's at least 18% oil content, preferrably a blend of castor and synthetic. I would suggest not using higher than 20% in aircraft. Higher nitro content will produce a bit more power, but it's more expensive, you'll burn more, AND it will cause your engines to run hot.
Dennis-