The Dorado is deeper, and has a medium v shaped signature. Bouncy and energetic. It has a good weight to the sound. Fun but still CA smooth.
The Lyra II is more flat...in a sense, it has more mids, warm, even and great instrument separation. Full with an excellent low end.
In terms of sound signature to my ears (And Ken confirmed I was pretty much on the Ball - excuse my pun).
Vega = XXX
Dorado = XxX
Lyra = XXx