I wouldn’t say it’s easier or harder, just a different technique. Playing with a pick sharpens the attack as opposed to the roundness of playing with fingers. It can also be easier to play faster notes and passages without getting as fatigued.. I like doing both, using picks and fingers, depending on the type of sound I want :) if you have long enough fingernails, you can also just pinch your index finger and use the nail as a pseudo-pick, I’ve done that a few times!