SOT23-3 and SOP8 found on obsolete injector modules, production ended in 2006. The writing can be the same or different on the same modules.
Hello,
Welcome to the DigiKey TechForum. Yes, part markings for the same part can be different. Typically the marking scheme is made up of the product identifier which should stay the same. They also have date/lot codes which will be different based on when the part was made. They may also have markings showing the location of manufacture which can be different.