Overall, the sound will be a much better quality. If you have played long enough, you should be able to hear the difference. Personally, I recommend that you go someplace where you can play around with a Strat before buying what amounts to an upgraded Les Paul. Find out whether you like the sound of a Fender or a Gibson more. Then you can make a better informed decision on which guitar you would like.

Oh also, if you ever have enough money buy a PRS. Those are absolutely spectacular guitars.