It could be that 6922EH has somewhat wider soundstage, but rocket logo has better balance within its intimacy (if that makes any sense). The differences are not huge but noticeable enough to make me enjoy the rocket more. With 6922EH the vocals are not so well balanced with the overall sound stage imo. Like I said earlier I'd like more space between me and the singer to match the overall vibe of 6922. With the rocket the sound stage is a bit more intimate which goes better with the mental image of the singer being close to you. Rocket creates this sweet intimate warm cosy vibe and is the kind of tube you want to play loud. I can see my normal levels are now 50-60%. 2 rockets for $18 is definitely a good deal. Highly recommended. What I would like next is to get a tube with wide sound stage and balanced transparency all across the spectrum. I'm getting excited here guys ;)
One more thing. In rocket tube the logo faces you which is nice. In the case of 6922EH the logo stays on the backside of the tube. I just think its cool to see the logo while the tube is in use. You can easily tell which tube you have on atm if you are, for example, constantly switching them.
Rocking Bill Withers atm. Cool stuff!