oh man, the below basic questions that get asked.. its like stuff better discussed when standing around in conversation rather then a forum topic lol
These type of questions are always too vague and with that you get a basic vague answer provided by OGstackdolla. Mods are ALL about the almighty $. Get which ever of those two motors you like then give me an equal amount of cash and ill find someone to build a faster motor for the same price. This is just an example.
To add, whatever you do in mods to one motor you can generally do to the other motor so the better question to ask is first dependant on what YOU want to do. We have no idea whether you want to crash ur car on the street like a fool, drive it real pretty like on the street, keep it in the garage, take it to the dragstrip, blow your motor, ebay it out, rev on that ferarri next to you, roadrace it or drive it off a mountain.