Yossi has a pretty impressive scoring rate for Liverpool, so I wouldn't say he scores less.
Garcia was the more mercurial player, the more likely to stun you with a goal out of nothing. He was a good finisher, at times displaying a strikers instinct inside the box whilst also being capable of sensational strikes from outside the box.
Yossi also offers that extra bit of creativity and is the better of the two with the ball at his feet, but has shown over the time that he's more of a team player. Maybe he's fortunate to be playing in a better side that is much more capable attacking wise, but you could argue that he's helped make that happen.
Anyways, I think Modokay pretty much summed it up.