gddr4 2900 pro compared to 2900xt gddr3?

I remember seeing how the 2900XT 1GB GDDR4 didn't do that much good over the 2900XT 512 GDDR3, so I'm guessing BASED on those results (Since both the Pro and XT are pretty much the same except for clocks) that you might find maybe a 5% increase in performance in the 1GB GDDR4 Pro depending on the clocks over the 512 GDDR3 Pro. (Meaning the XT would most likely be faster because of the clocks)

The orginal XT with GDDR2 had problems. I hope this is fixed, as well as giving the 2900 series enough texture fill. (it already has 320 streams) Then the 2900 series should be a screamer.

I was under the impresion that the latencies in the Gddr4 didnt really have that much of an improvement over the Gddr3.
My thinking is that this is a marketing ploy and i dont think it is worth it,what price for a Gddr3 512 Pro compared to a Gddr3 512 XT would be what i would be looking at.Taking into account that we are assuming that the Pro will OC a bit to get somewhere near a stock XT if you are lucky.
The other thing to ask yourself is are you running resolutions where you are going to use 1024? as you say it dont really mean much.
Cant really see the performance being worth the extra cash myself.
Just my opinion though
Mactronix