Genre Split ~

I just had a thought (everybody run! LOL JK!) 

We have ‘Regency Romance’ but it seems to have its own genre aside from ‘Historicals.’ And I’ll be honest, I’m not quite sure why.  So consider this: A ‘Cowboy’ histiorical romance would be different if the book didn’t have ‘Cowboys’ in it, but had ‘Gamblers.’ 

My book, A Touch of Destiny, is an old west or ‘Western Romance’ but it focuses on a gambler rather than a cowboy. 

Genre splits happen every so often, no biggie there. So what do you think, are you up for a genre split?