without a fight, to each their own
PC are more versatile and can do a lot more than mac
i myself am a macbook owner and soon to buy a second one to have two in my home, macs never get viruses, have owned this one for three years and i can recall less than five unwanted popups, theyre great for college students like myself, more creative, nice software, better user friendly, not to mention way better battery life
as far as for engineering id go mac, since theres no much in your field as where u would only need a specific type but thats my OPINION