None of that matters, the weight of snow is fairly consistent, lake affect just means the snow developed by cold air passing over a lake as opposed to moving in a storm over land.
Lake effect snow is dry. Snow-to-water ratios are anywhere from from 20 to 1 to as much as 50 to 1.
Non lake effect snows tend to have snow-to-water rations of around 10 to 1.
Dry snow weighs less than wet snow.
As I said, Storm Team 4 is exaggerating the weight problem. Lake effect snow is not your "average" snow.
Actually, the water content of the snow makes a big difference.
Lake effect can be very light and fluffy and easy to shovel. It can often have a water equivalent of 20:1. Twenty inches of snow that melts down to 1 inch of water.
Snow from nor’easters can have a much higher water content, like 8:1, which doesn’t sound like a lot until you have to shovel it.
If you have sleet and freezing rain and snow mixes, it can be 3:1 or 4:1, which is basically shoveling slush.
Guessing you are not a skier. Ever hear of powder?