Neither is more accurate than the other. The ending numbers aren't important here so don't get too caught up in that. Just make sure they always use STD when you dyno there in the future. Keep is consistent. That's the key.

 

will do,,,
now If My car was running a but lean,, does that mean it would not respond well to intake and exhaust mods?
Im just thinking of trying some intake mods again now that my AFR is in order

 

It might help, but keep in mind there are plenty of avid racers with a bit more mods and tuning that were actually quicker and faster in the 1/4 mile after removing their intakes. The only intake I'd consider would be the Stillen and if I had it, I'd fab it up so it's an enclosed airbox.