Cleaning? The Omega. There is no migration path from breech to trigger-- the Revolution, there is.
Maintaining? The Omega. One part to remove, the breechplug, for regular maintenance. No consumables-- meaning no red plastic jackets.
Accuracy? An open question, but the Omega has a two year track record, and a one piece stock with dual recoil lugs. Most Omegas are capable of sub- 1-1/4 groups, and many do better than that. Early reports put the Revolution in the 2 MOA genre.