In theory, the extra RAM shouldn't really improve speed too much. It's a trade-off you see. Without the RAM, large roms have to constantly page in and out of memory, which causes slowdown. With RAM, you don't have to do that, but external RAM is slower to access than DS RAM by nature. Granted, you've got a 3in1 (fastest slot-2 RAM) while I have a Supercard (slowest slot-2 RAM) so that may play a role, but I haven't noticed any real improvement when using v0.6 Alpha as opposed to v0.5 Beta.