E7s & Control Cab

On the left is a BLI sound equipped E7 (3010A) and the other is a P2K (3010B). From what I can see they have the same make sound decoders in them. They are a bit different in appearance as well as 3010 has no number boards. This makes me wonder if it was used mainly as a helper unit. Love them both though. Out of the box the P2K unit runs better, it is a smoother runner.