Product option / checkbox

ive created TWO PDF products which are basically the same. ONE has MORE Sites and templates. On the product site customers should be able to choose weather they want PDF-Product A (with less content) or PDF-Product B (with more pages) maybe done with a DROP DOWN choose, or a CHEKBOX¨

depends on what they choose, they will get the pdf they choosen.

is there a plugin which can do that with woocommerce?