Here are some things that may help:
From the MAME source (if the boards are marked) :
arkanoid World version, probably an earlier revision
arkanoidu USA version, probably a later revision; There has been code
inserted, NOT patched, so I don't think it's a bootleg
The 68705 code for this one was not available; I made it up from
the World version changing the level data pointer table.
arkanoiduo USA version, probably an earlier revision
ROM a75-10.bin should be identical to the real World one.
(It only differs in the country byte from A75-11.ROM)
This version works fine with the real MCU ROM
arkatour Tournament version
The 68705 code for this one was not available; I made it up from
the World version changing the level data pointer table.
arkanoidj Japanese version with level selector.
The 68705 code for this one was not available; I made it up from
the World version changing the level data pointer table.
arkbl2 Bootleg of the early Japanese version.
The only difference is that the warning text has been replaced
by "WAIT"
ROM E2.6F should be identical to the real Japanese one.
(It only differs in the country byte from A75-11.ROM)
This version works fine with the real MCU ROM
arkatayt Another bootleg of the early Japanese one, more heavily modified
arkblock Another bootleg of the early Japanese one, more heavily modified
arkbloc2 Another bootleg
arkbl3 Another bootleg of the early Japanese one, more heavily modified
paddle2 Another bootleg of the early Japanese one, more heavily modified
arkangc Game Corporation bootleg with level selector
As well, the rom sets in MAME for each game might give an indication.
Here is a
klov thread that might have some info.
And, Smittdogg or someone else at MAMEWorld may be able to help.