I'm glad I didn't have a fast car when I was 16, I'd probably not be here today.
As it was, I was lucky to survive my 1979 RX7. It could only get up to about 120ish. That car saw redline in 1st-4th gear every day I owned it. Today I still think I had guardian angels backing me up.
Anyway, be careful my friend. I hope you are more mature than I was!
They are both great cars for the money, so it really depends on your needs and wants. Come up with a list of reasons and uses for your car, that will help you and us make a choice between the two.
Whichever car you end up with, please, please sign up for as many driving schools you can afford (these are so much FUN), and go to as many autocrosses as you can. For one thing these venues give you the opportunity to learn what your car can and can't do in a relatively safe environment. I wish I had known about that sort of thing at 16, I would be a much better driver today, and maybe be doing some real racing. They also make you a better driver on the road, because you become a much better driver overall and know your car much much better than you would if you just drove around like an idiot on the streets. For a lot of people, once the thrill of the track is in your blood, driving fast on the streets is just boring and so you tend to drive a little more sanely.
