Cardinal Tetra anyone no any info?

today i went to my local pet store and i brought 3 guppys. but i noticed these fish like neon tetras. but the shop iasnt sed they were cardinal tetra. is tghis right? they looked amzing! ive always wanted neons and he sed that these were easyer to look after they were hardry fish is this right? and would they be okay with zebra danios? dont want them with my guppies and would prefer them with my danios. thanks for your help!