How do the heist mechanics differ between gta online and story mode?

The verified evidence only establishes that Grand Theft Auto Online is an online multiplayer action-adventure game released in 2013 as the online component of Grand Theft Auto V, set in the fictional state of San Andreas with up to 30 players. While the evidence mentions that players control a customizable character in GTA Online, it contains no information about heist mechanics in either GTA Online or Grand Theft Auto V's story mode. Without specific details about how heists function in either game mode, no meaningful comparison can be made between their mechanics, systems, or differences.