No one, and I mean no one will always win regardless of what abilities they have. Both of you are really out in left field. Fighting involves many many variables. Strength and speed are only two of them. Besides people make mistakes. Even do something well then have a bad day and make a mistake that wrecks that? People fight, not machines. People vary from day to day and minute to minute. nothing is for sure in a fight or anything else in life. Notice something here in Y/A martial arts section.... The only people that believe that this can or always beat that are the young people with very limited or no real experience. They sit around saying that this is better than that. Guess what it does not work that way.

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Well it depends who uses their resources better. If the fast guy is running into punches with his blazing speed, he's not doing any good with it. If the big guy doesn't know how to move effectively, then he's probably going to tire out.

Usually, speed always has the advantage and if I had to pick between being either the fast guy in a fight or the strong guy in the fight, I'm going with the fast guy every time.

Anybody that thinks that being stronger makes you slower needs their head examined. You don't get faster punches by getting weaker, you train for them and training will make you stronger at the same time. The two attributes aren't mutually exclusive, they're complimentary.

Which one is smarter? using good sound strategy is most likely to win the fight.