Anton k,
My answer to the point about the ailerons/ flaps etc being the same is 'so what' -- you will never find a scrap yard with any parts for a GY80 anyway. But every parts store or scrap yards in USA will have hundreds of every part for AA5's. Also the the other issue about range -- same tanks in the Cheetah or Tiger but, yes the 180hp does use more fuel, but again so what --- they will both do over 3 hours and that is about my maximum range before wanting the loo or a drink. Tiger is fast so will get there faster or go further in the same period. You get what you pay for, that is why the Tiger is more expensive than the Cheetah and the Archer is more expensive than the Warrior. Both the lower powered ones were more likely to have been used by schools and thus generally have higher total hours.