>>538006537
In SatAM as it released, Nicole is Sally's lifelike handheld computer but her backstory unexplored unlike in Archie. Over the course of the series (especially season 2) her personality starts to become less formal when Sonic is around and she even starts using some of his slang. This was apparently supposed to be foreshadowing her true nature. The revival was going to have Sonic shake Nicole one to many times until she spilled the beans. Nicole would then try to wipe Sonic's mind of the truth like she managed to do when she rebelled against Robotnik, but he'd reject it and tell her he'd keep it a secret and look for a way to get her back into her original body. This subplot would have been successful, but Nicole would be stuck in the body of a child when all of her friends grew up, and then she'd have an emotional reunion with Sally. Though Hurst seemed to imply this might have been temporary or have limitations somehow...
In Archie, Nicole is just straight up artificial, and has no ties to Robotnik, though the reboot coincidentally had a storyline where she was accidentally created through failed digitization.