The difference between offset printing and digital printing is that digital printing is better suited for short run printing (i.e. starting at 1 single copy) and offset printing is better suited for higher volume printing (i.e. starts being economical 2,000+ identical copies).To brief more:
Digital printing uses four colours (CMYK) with toners and inks to print digital files.There are less starting costs, less components involved, and no ink drying time necessary.
Offset printing technique creates images and text with wet ink and transferred to each paper sheet with aluminium and rubber plates. This method is more extensive than its 'digital’ counterpart because of the different printing materials that are used. Still, it is the most cost-effective option when you order bigger printed batches.