Yes, it does matter ^.^ Πάρε is 2nd person singular (εσύ πάρε), Πάρτε is 2nd person plural (εσείς πάρτε). Πάρτε could also be referring to one person, but in formal speech. (for example, when you're referring to someone that's older, or a stranger, and you want to be polite) ^.^