Hi,
AFAIK the A600 was definitely 32 bit (the 68000 was 32 bit, but appeared to the other components as 16 bit, or something like that).
Wrong, Its the same as the 368 CPU, 32bit internal, 16bit external, The standard 68020 was the first 32Bit 68K (And even then the EC version was 24bit).
Count how many data pins there are and you will see its 16bit.
It also stops you running OS3.5 & 3.9 :-(