2g Disposable Vape

Is an empty disposable vape pen 2ml the same as a 2g disposable?

Not necessarily. An empty disposable vape pen 2ml refers to empty hardware classified by capacity, while 2g disposable and 2 gram disposable are category terms more often used for finished device formats. Some users may search these terms interchangeably, but a precise category page should explain the difference instead of merging them blindly. In other words, an empty disposable vape pen 2ml belongs to a related product space, but it should still be identified separately from a finished 2 gram disposable or 2 gram dispo listing.