They are not the same. The CD32 is a 42 pin 1 meg rom (I Think) and the A2000 is a 40 pin 512k rom.
I often wondered if the CD32 Rom would fit in the 42 pin socket found on some A1200 motherboards and if that would work. If not, then what was the reason for including a larger socket on the 1200? I'm sure this has already been discussed somewhere.
Jeff