Both the G2 and the T2 are good all-around detectors. Between the two, I'd argue that the G2 is the better beach machine. However if your primary interest is coinshooting, most knowledgeable folks would probably say that the two best choices in the Tek lineup are the T2 and the Omega, with the G2 being the 3rd choice. Most folks would probably say that of the three, the G2 is the best on sites with a lot of iron trash.
In other words, there is no one "right answer", it's a question of which is the best fit for you and the kinds of sites you hunt.
The Fisher lineup has some models that are roughly similar (F75, GB Pro, F5) which you might also want to take a look at.
--Dave J.