Yes! The Neon is actually manufactured by Chrysler and is known in most countries as the Chrysler Neon. Chrysler owns both Dodge and Plymouth as well and so the car is often called the Dodge Neon or...
check the part numbers on the computers. It'll have 6 or 7 numbers with 2 letters at the end. These 2 letters can be different. They change with a software upgrade. AA upgrades to AB then to AC and...
The Chrysler/Plymouth Neon is physically the same as the Dodge Neon, since Chrysler, Plymouth, and Dodge were all the same company when the Neon was released.
Both model years contain the OBD2 ECM, but the firmware or wiring could possibly be different for each car. And has to be from same engine (DOHC or SOHC) and same tranny(auto or manual).