Steak? or Hamburger??

So after dinner i began to think. (i know rare occasion huh?) Steak tastes sooooo good and it's made from cow but so is hamburger and they taste different but they are both cow meat!! So i decided to ask my friend Shane...... he was NO HELP AT ALL! he just says "they are different meat" but they are both cow meat? what is soooo different about them?? i wanna know! How come food tastes different if it's made from the same animal?? Just weird does one piece of meat get different vitamins or something?? And farther more,, why do we call it HAMburger? Ham is made from PIGS! Shouldn't it be called beefburger? or something? We name a COW product off of a PIG! i think we have things all mixed around as humans!