Is there a way to quick compare items on the ground with what you have equiped?
Solution 1:
As long as the item does not need to be identified, you can hold Ctrl and hover over the item to show its stats. If your inventory is open as well, it will compare the ground item's stats with what you have currently equipped.
If you hold Alt and hover over with your inventory open, it will compare it to your off-hand if it is a weapon that can be dual-wield.