you're rate at picking up musical instruments and learning them > mine
my rate at picking up, and understanding math most likely > yours (never got below 90% in any math mark since the 5th grade-- i've gotten only A+s in my college math courses).
Who's smarter?
I have studied music extensively and it seems you have studied math plenty so those really aren't good examples. I'm not sure if there is really an accurate way to determine who is more intelligent by my definition. It would need to be measured via something that is an entirely blank slate to each of us, which is theoretically impossible. Some of the existing knowledge we have would play a part in everything whatever we did, no matter how obscure.
And I'm smarter