Dry snow. If you try and make a snow ball, it falls apart. Not sticky.
Wet snow. Success! You can make a snowball. It's sticky and a right bugga to shift.
Loose snow. Hmm. Like dry snow I'd have thought.
Compacted snow. As it says on the tin. It's been squashed together already.
You can operate on it.
Slush. A combo of snow, ice and water. Quite draggy when trying to take off. Slippery as any thing when taxiing.
This is a good reference.
Skybrary Not much on snow though.