Tonebar 12 vs. R. Randolph steel king vs. Bass Bar

[Jeff Dale]

Hi all -

trying to figure out the difference between the alumitone tonebar 12, the bass bar of the same dimension and the Robert Randolph signature 12 model. No info ANYWHERE! I think I read that the bass bar and pedal steel 12 were the same, but the RR? Is it hotter, better or just another package for the alumitone 12?

Any info would be greatly appreciated!

Jeff in WA