to get the same affect with a wraithlord the points look like this:
Wraithlord
Wraithsword
twin-linked flamers
Eldar missle launcher
125 points 30 points cheaper then avatar
The wraith lord has lower BS and WS but has higher strength and toughness lord has I 4 and the wraith sight can but him out of action if you aren't careful
S10 T8 BS&WS4
has 2 attacks so gets bogged down in a unit easily
With a wraithsword he can re-roll missed combat attacks but can still be hit by the enemy easy
Avatar has double the lords attacks A4
Avatar has better I with I6
Inspiring means that he can hold up an entir part of your battle lines because all eldar around him become fearless
Avatar has WS10 and BS5 so in combat not much can touch him while he will almost always hit and BS lets wailing doom kill something every turn with very little chance of failing
But the avatar has S&T 6 so he won't be smashing tanks as easy in CC but shouldn't need too because wailing doom means he is packing a melta gun and he will get bogged down in a swarm as he can only insta kill bugs, guard, tau and fellow eldar
There are the facts over all the avatar is a better combatant but isn't as long rang as wraithlords can be
__________________ "The heart that quavers in the breast be damned!
We'll stand our ground right here upon the field;
And we'll provide the carnage and the slaughter
-Roland Vote on the Battlefield <---Pssst! Thats a link |