Are you kidding there must be a tone of stuff on the net, if not I would suggest buying a couple of guitarist mags.
Basically you are talking about to totally different animals and folks generally have strict alliances to one or other.
The Strat is from 1954 and was an updated version of the Telecaster, the Start first in the UK was owned by Hank Marvin of the shadows. They are a great alround playing guitar with a lighter tone to a Gibson Les Paul, with thinner frets and an easy neck, great for country, Rock and everything in between.
The Les Paul is a really heavy beast, with a different pick up style, effectively a double version of what the strat has, giving a much more dense tone, great for rock and blues but less comfortable for styles that require more twang. The Les Paul is I believe slightly earlier than the Strat and has been in and out of favour with guitarist for years, but remains one of the best guitars around.
The Gibson has stayed pretty ture to the original design over the years where as the Strat has gone through many re-workings to become more flexible, however the basic model is still the best, like most things they should be viewed as use the right tool for the job, but most guitarists will only use the one they prefer, and feel wise they do play very differently so if you are used to one the other will not be easy for you if you have never tried it.
The one big disadvantage with the Les Paul is the weight, they are heavy beasts and worn around your neck for two hours they will make you feel shattered. The Strat however kinda just hangs well and feels great but you do lose out on power a little.
That being said, it all depends on the Amp you use, a good Valve Amp is the best way to get a true tone, but each one will alter the tone a lot so again you must get the right one for your style of music.
"It is better to sit in silence and have people think you're a fool, then to open your mouth and remove all doubt"