RB25 ecu/ Tuning questions

[cloudstruck]

Okay so kind of complicated question i couldnt find an answer to
I ended up getting an rb25det recently
came with swap harness, original harness that was cut up, driveshaft, mounts etc....
but upon looking into it more as i started swapping, the ecu didnt match up to the new swap harness
I found out i have a series 1 stagea rb25det that originally had an auto tranny (ecu has the grey plug)
but the harness he gave me has the z32 style plug (blue plug)

my question is would i be able to use a tuned z32 ecu on this motor and use the swap harness he gave me
or will i have to get an r34 neo ecu and have my harness remade to run nistune