I prefer tarantulas mostly because I like tarantulas, and spiders in general, more in real life. We had a tarantula as a class pet in kindergarten. I don't dislike scorpions, but I do find them a bit disturbing
i am not a fan of either LOL tarantulas have always freaked me out (although i have never seen one in person) and scorpions i used to think were cool until i moved... now i see them everywhere and they are kinda creepy !!