Testing my new 17mm 1.8

I guess sharp is relative.  I wonder how it is relative to the 20 1.7, 25 1.4, 45 1.8 and 75 1.8.  By all accounts, not as sharp as any of those but still pretty sharp.  That's what gives me pause.  or seld, I'd have traded the 20mm for the 17mm.

Thanks,

MTMT