Yes. This is a result of Elmo's contributions with his crosses, etc. He had a larger impact there, but attacking output is basically just a summation of xG and xA, which are both important, but don't tell the entire picture.
When you look to the radar chart to the right (the * looking thing), you see that Cash is a much better shooter, similar receiving the ball in the box, and a better dribbler. Also, we see that he's better in ground duels (one on ones against defenders) while in possession (which is expected considering his higher rating as a dribbler). On the far right in the shooting ratings, we see that Cash is a 77 on non-headers in open play. Elmo didn't even qualify for a rating. This is likely due to Cash taking 44 shots last season (10 on target) while Elmo only took 5 (1 on target).
In other words, Cash is better on the ball and a lot more aggressive with shots than Elmo.
Also, I should mention that 50 is average. So any number higher is above average, etc.