Sound Theory

What, I wonder, is the peak decibel difference between a bell and a glockenspiel, both made of the same mass of the same metal, and both struck with the same hammer?

Somewhere there will be a somewhat inward looking fellow who will have the background and interest that would allow him to ponder this puzzle and estimate a credible solution.

But where does this fellow lurk? How do I find him? 

Probably not on a private blog,  I’m guessing.