Both pothos and philodendron belong to the Araceae family but if you break it down further youll find the difference. Pothos still get large but they dont grow as quickly Philodendrons new stems and growth have a pinkred tint to it while Pothos is green or slightly lighter green Now I know there are Philodendron that obviously dont look like Pothos- like this Moonlight Philodendron that has a totally different leaf shape and growth.