Edelbrock Performer RPM

No that I'm aware of Dano.

Rebel Capt. On the dyno, you'll find more power. At the track, you'll be hard pressed to justify the money spent on the minimal gain.
By way of the seat of the pants feel, you'll never know the difference.

The RPM has a smaller port window with better runners. This will aid in the "Off the line performance."
The LD-340 has a large port window that can move a lot of air. But the runners are not so smooth. This intake has a lot of potential behind it.