difference between opticcs on a 8" and a 10"

Hello,
I'm looking at buying a Meade LXD55 10" I noticed the best magnitude was a 14.5. The 8" version was 14.0. Even though there is a 2" difference in the mirrors, there is only a .5 difference in best magnitude. How much better is the 10" than the 8"? Is it worth the extra money of a 10 over a 8? Thank you.

Depnds on a couple of things, first what will you be using the scope for primarily, visual or imaging? Second of what?

Thank you for the replies. I would mostly like to see deep space objects, but planets are nice too. I shouldn't have a problem lifting the 120 or so Lbs. the LXD55 weighs. I was just wondering about the small difference between best mags. seen with each scope, 14 (8") and 14.5 (10"). How much more will I be able to see with the 10 over the 8? Thank you.

Another thing to consider is that a 10 inch will split closer doubles, not a big deal if you are not into doubles but, that resolution does make itself clear when you are viewing planets. Consider that Jupiter is roughly 31 arc seconds wide, the extra resolution translates into a lot more detail. Same thing with the Moon, there are details you can see in a 10" that you cannot see in an 8". Finally even in DSO's there is structure that you can see, not even accounting for the light grasp difference.