I need to select my glow fuel for the coming season. I have two choice and I want to know if both are equivalent.

Power Master
Magnum

I usually buy the Power Master Mean & Green full Synthetic but the Magnum is cheaper. I use only OS motor, 46 AX and 55 AX. I fly both during the summer and winter ( around minus 5-10 C ). Normally I use 10% during summer and 15% during winter. Any suggestion between theses two brand ?

Séb