it will be less power compared to 33% if thats what you were running before.
nitromethane is only to increase power in these nitro engines, the true "fuel" is the methanol. higher nitromethane content also allows for a wider tuning window because it is easier to ignite and more volatile so it will be harder to tune comparatively.
that fuel also has 17% oil (as advertised as least) and is full synthetic. keep in mind airplanes and helicopters both typically run almost full throttle the entire time they are running, so their lubrication requirements are different, and also having that much oil is going to lessen the tuning window as well.
i dont know your relationship with your LHS but it might be worth trying to have them order some land vehicle fuel in. personally i prefer sidewinder race blend 20% nitro/12% oil . try to stay 12% or under oil (unless you are running ABN type engines) as any higher it just makes for more finnicky tuning and reduces power as the actual fuel is just getting replaced with unneccesary oil.