I will try to get to that, but been busy. Generally, and empty 044/440 12 mm powerhead is 14 lbs, a 460 14.75. I'm sure the 460 P+C add a little, but very little, so I'm sure they are at least 1/2 lb lighter.
If that makes a difference to you will depend on you, and what you do with the saw. For example, I have to take down a good size Tulip, that has a slight lean, and is next to a broken down stone wall, and has some rot on the bottom (where it split from the other half). I will be happy to have a saw that is as light as possible and allows me to reach as high as I can and get the cut angles I want.
They can also be nice when working on a wood pile, light weight and the reach of the 28" bar is nice, but when cutting some I prefer the 20" bar to reduce collateral damage.