Now that the servers are up, I can finally look up the orb cause I'm terrible at remembering names.
The orb has 251 int with a red socket, mastery and haste
The Ledger has 251 with red socket and haste + spirit
The ledger reforged ends up with 166 haste, 69 mastery.
Orb has defaulted 157 haste, 170 mastery.
Both have the gem socket bonus of 10 int.
So, Orb depending on if you need spirit or not is good to hold on to until you have a chance at the heroic ledger due to the int upgrade. So you should be fine using the orb for a long time.