Thank you all for the input.
I really do appreciate that ever dyno is going to get different results and i am almost certain that if i were to return to rstuning i will see the same figure which i got when tuned. I'm sure you'll understand the disheartening feeling seeing my car hit what it did on ssr espically after seeing an untuned adriank hit 290 without any tune.... But like people have said its best to stick to 1 dyno and gauge the gains from the one setup