First (5 inch Pin to PAP) should be a little longer and a little more angular on the backend.
The 2nd (4 1/4) would be earlier and smoother break point.
If you polish the first one it will just get it longer and more hook on the backend.
There are alot of other factors like speed, revs, rotation and tilt, and lane condition but that should be the general difference.
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18 mph,350 rpm,PAP 5 1/2 x 3/8up, 15 deg axis tilt, varied rotational axis deg.. usually 45+
HighGame 300 x 4, High Series 808
Book Average 205,PBA Xperience 185