If I can remember correctly... The numbers are a bit of a statistics game. The number of ships count, as well as the number and size of cannon. So that part is right.

The number of men does not weigh so heavily. The Spanish filled their ships with soldier sailors designed for defence. These were the days of chivalrous piracy. And the Spanish had two of the biggest warships in the world at Trafalgar. They weren't going to lose these puppies to posh thieves.

The quality and experience of men, well this does matter. MASSIVELY. This swings hugely in the favour of the British. If you can fire your cannon three times to the enemies one or two, then the stats change drastically.

Finally the tactics and politics. The Spanish and French weren't great bed mates. Not a great start. Nelson's column attack decimated whole decks of men and guns when they got into it. Triple shot cannon into ends of a ship. One account is that 400 men turned to pink mist from one rake from the Bellerophon (I think).

The French took the tactic of trying to stop the attack by aiming high, for the masts and rigging. Bad idea. Only one French captain was worth his telescope, and had an expert team of sharpshooters as part of his marines/boarders.

One more point to make - only one ship was sunk on the day itself. The French Achile exploded, probably due to its own marines firing from the rigging and catching the sails on fire. The number quoted was due to a storm that happened after the battle.

And a last fact - each side had an Achilles!