Cleon
Legend
Both Large undead (augmented animal), I suppose.
Well there's nothing much to the Lesser version, so shall we do the standard Ghost Mount first?
Large Undead.
Able to disguise itself as a living steed (= disguise self?).
Can energy drain a rider (Will save to resist).
Since these creatures seem to be material (despite being called "ghosts", I think they'd be similar to a Nightmare or Heavy horse as far as their abilities go. Since they've only got 3 HD, I doubt their stats are that good.
How about this:
Ghost Mount: Str 16, Dex 13, Con —, Int 6, Wis 13, Cha 12, NA +5