10'' or 12'' - Much Audible Difference?

I have been running combinations of 10's for years myself and was thinking about trying 2 12's in my daily driver this time to hear if there is really a difference. These subs will be Brahma / XXX or I may try the AudioQ HD's that were brought up earlier, for fun.

So what do Ya'll prefer for street SQ and major SPL?  10's or 12's??

Just curious

i think the 'tightness' they are refering to is a product of the higher fs 10 inch woofers inherently have over 12s along with the increase in cone area changing mechanical and electrical resistances inside the motor structure.  the' 2inch difference'mentioned earlier actually translates to about a 45%increase in driver area(remember your geometry area of a cirlcle=pi(3.142)xradius squared) so hypothetically 10s have 78.55in2 and 12s have 113.112   of radiating area.  if the same motor works on the cones with different areas there is going to be some differences in the resistances that the motor sees.  think of a drummer and how he gets different freq beats by hitting different size drum heads, generally the same concept.  however i've seen 10s with fs of 29 hz and 12s with 43 hz.  but if you compare a 10 and 12 same brand, same model subs generally the 10s will resonate at a higher freq, therefore sound 'tighter', and generally same brand/series 15s are 3 db more 'efficient' than 12s which are 2 db more than 10s,   all of this goes out the window of course if the enclosures are tuned improperly.

i must be bored...