Yes, will do so here. Here goes...
Base damage is generated for both sides (based on level + item damage + extra damage). Strength damage increase is then calculated, which is totalstr * seed / 22 (defense is the same formula just on defense with a new seed). For defense, basically a damage absorption value is calculated. When the two numbers are factored together, we ensure at least 25% of the damage is processed (creating a point where you can't become unhitable). Strength and defense mitigate and produce the same damage, just we limit all damage from being blocked so there's a cap on being extremely over on defense vs. someone who is attacking you (in effect making you untouchable). So, in all attack cases, you will take at least some damage.
So, now to the end result... Having greater defense will, of course, reduce the damage you take when being attacked. Having more strength causes more damage to be done. The side with the greater damage is, of course, the winner.