Actually you're both right...kinda. The 90-93 Accords (PT3 ECU if I remember) had OBD1 connectors on the ECU, but the ECU itself used OBD0-era electronics hardware inside. It wasn't the same hardware family as the 92+ Honda ECUs that are usually called OBD1. So it isn't really an OBD1 Honda ECU, but rather a pre-OBD (OBD0) ECU with OBD1 connectors. It's hard to make generalizations because there really weren't OBD standards until OBD2 came out.

I'm not sure what the pinout is on that Accord, but be careful. Because it isn't the same hardware family as the other OBD1 ECUs, the pinout might be completely different even though it has the same connectors. Everything after 1992 really has the same pinout, Accord, Prelude, Civic, Integra, etc., because it's all the same hardware family internally. It's kind of the opposite of the Civic PR3/PW0 OBD0 ECUs, which had OBD0 connectors but very close to OBD1 internals. Fun but completely useless trivia, I know.
I'm just saying you should check the pinout with a factory manual before you plug a later model ECU in there and potentially fry something. You can probably find an answer if you look around, just be cautious until you can verify that one way or another.

The good thing is that if you find the pinout is different, you should be able to re-pin the connectors so you end up with a 92+ pinout in the end. That is, if I'm remembering all of this correctly.