Having tried both a ton before settling on the Push 2, the screen is great, but that's not why I bought it. In every way it feels better to make music on than the first Push. The pads especially are a thousand times more responsive — the Push 1's got this weird wooden feeling that never seemed to register the velocity I was going for.
I think the Push 2 is ~3x as much, and it is worth every penny.
I was shocked at how sensitive the pads are on the Push 2. A graceful brush of a finger triggers the pads. I know that sensitivity can he adjusted, but wow! I produce classic Hip-Hop / Rap music which involves sampling. The screen is insanely helpful when it comes to chopping samples.
I think the Push 2 is ~3x as much, and it is worth every penny.