knives - differences in blade length
All other things being equal, I prefer a 10" forged German chef's knife for most applications. But all other things aren't necessarily equal; the biggest variable is the size of the cutting board. Bigger blades require bigger boards. I usually use 11"x14" flexible silicone mats, but working on them with a 10" blade feels cramped. So the 8" is my go-to knife.
I weighed a couple just for the heck of it.
8" Wusthof classic 8.75 oz
12" Wusthof classic 12.5 oz.
10" Global 9 0z
The global feels much lighter in the hand although I'm not a pinch gripper. For me there is a major difference between what I might want at home and at work. Either way I find the 8-10" to be the most used. The type of steel and the style of knife is as important as the size.
Well that kinda proves the point that a bigger knife from the same range is generally heavier, but a bigger knife in general is not necessarily heavier - especially if it's Japanese.
However, like most people said, it's a case of personal preference... go try the knifes out and see.
The bigger the knife, the better the lever effect you get, longer knifes are no necessarily heavier, although it would be reasonable to assume that with two knives from the same range, the bigger one would be heavier; perhaps the manufacturers like to keep them the same weight though?
For home use it seems that an 8" is better, although that is mainly based on space and such like - smaller worktops,smaller knife etc.
In summation, the 10" wont really show a huge difference from the 8", but if you think that extra weight(?) and extra leverage justify the extra cost, then take the plunge and go for the 10" knife. :)
This is totally personal choice. At work I often prefer a 10" knife as I appreciate the weight. I have German 8 and 10 as well as globals. Some times light is nice as well. It's like asking which is better, A stiff boner or a flexible one. They both have their strong points. There is a pretty substantial difference in weight between the two. Go to a store and handle both. There are no wrong choices. ;)
a lot depends on what your use to and what you cut. I have a 8" German chef knife and a 9.5" Japanese gyuto. With the bolster on the German knife the effective length is less and using a pinch grip will lessen the effective length but what part of the knife do you really cut with. Usually an area closer to the handle than the tip. If you are slicing a large brisket you would appreciate the longer 10" blade.