I tried out both the 6CG7EH and JJ Goldpins 6922, and greatly prefer the JJ's. The EH is definitely a different sound. Warm, but seems compressed or even a hair muffled. Both bass and treble seem to roll off, and resolution seems less. I did some rolling at work with a buddy and he immediately remarked the JJ was a "significant upgrade" over the 6CG7.