the 7770 was not direct competition for the 650ti... the 650ti was placed and priced right in the middle between the 7770 and 7850, in both price and performance. if the 650ti comes down to 7770 prices, then the 7770 becomes overpriced. The direct competitor for the 650ti from AMD was meant to be the 7790.
At a little lower price it offered better performance, and was meant to be the 650ti killer.
The 650ti boost is clearly aimed straight at the 7850, and by extensionthe 7790. priced about the same as the 7790, and performing about as good as a 7850, it's a formidable challenge to both cards. Which will require AMD to cut a number of their card prices to remain competitive.
Radeon 7770 and GTX 650 Ti were competitors until the Radeon 7790 showed up. The GTC 650 Ti Boost is a competitor for the Radeon 7850 and merely has a somewhat lower reported price. The Radeon 7790 is still not its competition because it is specifically competition for the GTX 650 Ti now.
That the 7790 was meant to be competition for the 650 Ti is totally irrelevant in the context that we were in because the 7790 is still not here and we didn't even know about it until recently. Before it, the only competition for the 650 Ti was the Radeon 7770.
The 7790's MSRP is not nor was below that of the 650 Ti.
Besides, about all of this middle of the road crap with the 650 Ti between the 7770 and the 7850/650 Ti Boost... Do keep in mind that in decent quality settings and such, the 7770 is literally right behind the 650 Ti. The 7790 makes a better case for being in the middle because it's actually in the middle instead of only a little bit above the 7770 and far below the 7850.