FNSKU vs UPC On Package for Private Label Products

Hi All, I’m getting ready to launch my first two private label products on Amazon (will be FBA). I’ve went ahead and purchased a UPC for each as I also plan to sell (or try to sell) wholesale as well.

Are there pros to putting the FNSKU on my packaging instead of just putting the UPC in this situation? The advantage for me by putting just the UPC is that I can sell the same inventory into wholesale.

Thank you for the help. I know, probably a newb question but I’d love some guidance here before making a mistake.