Both basses are in the same ballpark in terms of built quality and pricing. (And this price range is what I can currently afford.) Playability -- weight, neck radius, nut, etc. -- also seem roughly equivalent in both instruments.
I currently own a Tribby L2500 and it's a fantastic instrument. The Ray5 HH has been intriguing me for a while, but I can't find one around to try. I'd have to order one and quite possibly wait 6+ months for it to be delivered.
As much as the L2500 gives me an incredible array of great tones and a super solid architecture -- bridge, body, neck, fretboard, etc. --, the Sterling appears to simplify things quite a bit, as well as give out a meatier, bassier sound.
So in short, what this poll really asks is:
Should I shed for a Ray5 HH, considering that I already own a G&L Tribute L2500?