Well i don't know much about PCB but as far as i can see the GW have more components and that can mean there's more features hardware wise to the card than we know about. If the gold r4i have all that it needs in one side what do they cut out?? Less or smaller doesn't always mean better.
Not really, the big difference is the location of the Actel chip.
Both PCBs are really similar, the big difference is,
in gateway it is on one side of the PCB, and everything else is on the other side.
On R4i Gold Deluxe it's together with everything else.
I wouldn't be surprised if Gateway, in the next hardware revision, do something similar to what R4i Gold Team have done.