I find that extremely strange. 1 year later than X360 and PS3 has (a friction of) less ram for gaming? Did Sony even considered to have additional 256MB ram (total of 768MB) in their "next gen" console? Would additional 256MB GDDR3 ram @ 1400Mhz drastically increase manufacturing cost of PS3? I extremely doubt that as even Geforce 7600GT which ram has exact same spec as in PS3 is quite cheap nowadays. That also means that GDDR3 ram cannot be "to expensive", especially for such a large company as Sony is.
256MB more ram would mean that PS3 would have 192MB more than X360 for gaming. That would be a huge memory advantage for PS3. 40% more ram than competion.
X360-> 512-32=480
PS3-> 512-96 = 416
What if scenario
PS3-> 768-96 = 672
672/480 = 1,4
Technically speaking, PS3 now has only one edge (Cell) against X360 and it's power has yet to be mastered and "released".
I sincerely wish that they would have given the PS3 more RAM. In my opinion just another 256MB of XDR RAM would have been all that would have been needed.