Performance is more related to the code of the browser and the quality of your wireless link than anything else.
The assembly to unlock the browser does this exactly:
-puts the 3in1 in browser RAM mode
-puts the markers/header that Opera expects in the RAM cart to the correct places so Opera's check for the RAM card passes
The reason why cached memory performs better than other slot2 RAM hacks... a cached RAM is not necessary to run GBA games, but it does help to have the memory ready cycles before the rest of the RAM is ready so writes to the bus can continue at will between flushes to RAM instead of waiting for a ready signal.
BTW: atrocious spelling is nothing even close to poor understanding of "western" grammar while translating a glyph based language to english. At least the grammar errors leaves something readable, that makes some sense.