I love how this article tries to explain things but doesn't take into account the original article about how the Droid X is able to display
487780 vs 332556
Every argument is invalidated at that site
1. Both phones are running android 2.1
2. Both phones have a GPU that will need part of the RAM
3. Droid X doesn't need any RAM dedicated to the OS???
C'mon people there something way deeper going on here!
The only explanation is in the comments of that article that shows the architecture of the chip is using 128 MB as ONE DRAM for faster communication amongst the other processors.
http://dev.odroid.com/wiki/odroid-t/pds/FrontPage/s_blockdiagram.jpg
This design probably explains why there would be more lag in the Samsung phones.
It sucks but it has to be the way it is.
128MB of the ram is different from the rest and cannot be used by the OS