now you are mistaken, As you are comparing PC to Console, It's known very well that PC games install, So are fully compressed on disk.
As for the 256/256 memory.
You are dead on. Sony themselves say so.
not only that, The Sony OS takes up more Memory than the 360 equivalent.
That said though, To be honest. Its down to developers to implement hardware in the best way it can, So 256/256 memory may look worse on paper, If a developer makes the most of it, It wont show.
Dirt and Oblivion being instances where the PS3 versions are better. Shows its possible.
MGS4 is amazing looking, And with 256mb as its maximum. It's really nice.
Hardware does not account for everything.
And just so people know, The 512mb unified RAM isnt the main reason the 360 has the nicer graphics. The 360 also has 10MB embedded dram in the GPU.
May not seem like LOADS, but, it basically gives the 360 a free AA overhead.
May seem like a wierd reply from me, But I don't like looking for the bad sides of consoles, I'd rather look at the plus sides of both consoles.
As so many people say, I'm in it for the games, I hate a lazy developer, much more than I hate a hardware limitation.