[quote name='Pbassred' timestamp='1343591996' post='1752517']
Are you typing for practise of making a point here? Is it that 10" is obviously better, or that there obviously is NO difference? There is so much debate, Its difficult to know which side of the polarised debate you are on!
[/quote]
My point is that the "argument" is pointless.
The benefit a 15 has over a 10 is that it moves more air (the surface area of cone is more).
The benefit a 10 has over a 15 is better dispersion (how much sound gets to your audience on the horizontal axis).
Drivers usually cover the same frequency range regardless of size, it's up to the cab designer to get the best from it.
If you want to know more, have a look at either Barefaced's or Bill Fitzmaurice's site.