@MikeB
You put a lot of stuff there. Honestly, BluRay has lots of good points against DVDs, from the lower roatation speed (less noise) to - obviously - the capacity.
But once your file seeking has ended, if you are loading a lot of sequential data as in a big level all in one go - instead of streaming smaller amounts - it's the transfer rate that will matter.
And if the most read data are placed on the outer rim of the DVD, on the first layer, then the loading would be quicker on the DVD.







