Patent shoes - Help needed

Folks,

I am in the market for patent leather shoes. I narrowed the choices to Herring Waltz II and Church's Alastair. I was wondering if some of you could tell me why is it that some patent shoes are made with all leather heel. Most of the shoes nowdays have full rubber heel or 1/4 rubber tip built into heel. Are there any reasons for patent shoes to have all leather heel. I know that Brooks Brothers patent shoes have all leather heel. It looks like Church's Alastair has full leather heel too.

the links to the shoes

http://www.herringshoes.co.uk/product-info.php?&brandid=4&shoeid=69


http://www.herringshoes.co.uk/product-info.php?&brandid=6&shoeid=5286

Thank you for your responses. I thought it had to do something with walking on the red carpet. I was assuming that the rubber tip would be rubbing the carpet when walking.