What is the difference between 'easy' and 'easier' in ASL?
In ASL, 'easier' is based on the sign for 'easy'. To show the comparative 'easier', you can emphasize the sign by making the upward brushing motion larger or extending it higher. Sometimes, signers will also add the ASL suffix for '-er' (a thumbs-up 'A' handshape moving upward), but emphasizing the main sign is very common.
Do I brush my hand once or twice?
For the standard sign 'easy', the hand is typically brushed twice. For 'easier', you might brush it once with a larger, more exaggerated upward sweep, or stick to the double brush depending on the natural flow of your sentence.
Does it matter which hand moves?
Yes, your dominant hand should always be the one doing the moving and brushing. Your non-dominant hand acts as the stationary base. If you are right-handed, your right hand will brush the back of your left hand.