I used both units. Currently use the Omega. As a turf coinshooter, the nod goes to the Omega. Dave J's description pretty much sums it up. Is the T2 deep....oh yeah!!! However, I wanted a more 'relaxed' machine for coinshooting. If I were doing relics/prospecting....the T2, hands down. The Omega hits hard on silver. Alot of people claim their brand of detector does too....the Omega really does!!! Way harder than my White's unit. Great on silver dimes.
DanielTN is spot on in his assessment of the Omega. My area, Idaho is fairly mineralized, but not as bad as Daniel's soil. If coinshooting up to a depth of 6" I like to use the stock concentric coil when bottlecaps are prevalent. Anything deeper than 6", out comes the 11" DD. In trashy areas, the 5" DD is the boss. I am still amazed at the depth and separation this little coil gets. Who ever designed it (Dave J ?)....its a awesome piece of work.
I forgot to add, in my soil, I can run sens between 75-90 and machine stays quiet in regards to soil mineralization. I could go higher. I don't see much value in cranking it to 99, as the extra noise can mask deep/faint signals. But hey, thats my preference. Although, the depth increase between 90 & 99 isn't very much. So I don't set to 99. Now if your in a area with alot of EMI, the Omega will chatter, just like the T2. Both machines seem to behave similar in regards to EMI in my experience. And you have to dial the sens down. But even at 60 sens, using the 11" DD, the Omega gets serious depth.