Hmmmmmmm!
Why do they call them Loud Speakers?
I have used alot of Utahs, Celestion Green Back 25's ,and today, about 7 Vintage 30's..
In my dinky Fender Blues Jr., I swapped the stock Eninence Fender Special Design,, :S out for a Green Back 25 I had laying around here sence the early mid seventys..
It was much smoother and warm sounding than the stocker, but could get flubbery when useing pedals and effects.
I had switched a couple of my cab's over to Vintage 30's, so decided to try one in the Blues Jr about 9 months after I installed the Greenback in her..
Much crisper and quicker responce, maybe not quite as smooth, but for my style (Classic Rock/Blues/Country & maybe a bit of jazz along the way) but the Vintage 30 has stayed there for 11 or more years..

Sad part of the story today though,, Celestion moved there production of all but there most expencive speakers to China..
I probebly will be looking for a good replacement sourse, should the 11 Celestions I currently own fail..