Does anyone know why the different heels on the 3 PRO series shoes they offer??

What is the difference?

They say the same description on all of the shoes but they all have a different design and look

http://www.etonic.com/mens/bowling/epro/epro-EBMD504-1.html

http://www.etonic.com/mens/bowling/epro/epro-EBMD505-20.html

http://www.etonic.com/mens/bowling/epro/epro-EBMD506-1.html
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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 5, High Series 808
Book Average 220,PBA Xperience 185

I love my Etonics too.. only shoe that I am able to get a consistance slide at every house I bowl in.
Tried dexters and 3gs and could never get a slide that worked..

I have the same shoe you are talking about.. but with a different heel.  My heel is more like the one in the other two links, but black.
Take a look at the pics.. Do you have that heel?
The pics in the 1st link have a newer heel.

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18 mph,350 rpm,PAP 5 1/2 x 3/8up, 10-13 deg axis tilt, varied rotational axis deg.. usually 45+
HighGame 300 x 5, High Series 808
Book Average 220,PBA Xperience 185