It is just a little lighter Mason, as the 10 mm saws are a bit lighter than the 12 mm ones.
However, the throttle response is faster, I think the saw cuts faster (the 462s are ported, the 044 is not), it is smoother, no screwdriver needed, and the air filter needs much less attention. The 462s are just more pleasant to use.
It is kinda like comparing an old Muscle car with a carb and 2 valves per cylinder to a new car with direct fuel injection, Variable Cam Timing, Multiple vales, Computer Controlled engine, etc. There really is no comparison. The newer engine will run cleaner, stronger, have a broader power band and will be less trouble to keep in tune. You will change plugs every 50,000 miles instead of every 5,000 miles. It will also get far better fuel economy.
I still am impressed with my old saws, but use the new ones far more when I need to do something.