Saving Illustrator File for Print

When i save my illustrator file as a pdf the coloring and textures look very different from when it was saved as a jpg. And if i open the pdf in 2 different programs they both looks different! How do i know which way it will print? I would just send over the jpg but i cant seem to save it with the bleed and crop marks. Any advice would really be helpful! I am trying to send it to her tonight…

Could be to do with if your file is set at RGB and not CMYK
Or check when you save as PDF, - on the “Output” setting - check if there is conversion something - it’s to do with the colour. Lmk if you need me to check exactly