[Boromir88]

Sauce, Boromir certainly seemed to be the type to rush into battle (without always thinking), and I think him jumping onto the Bridge with Gandalf and Aragorn to fight the Balrog is a good example of this. Also, it's interesting that Boromir was compared to Earnur who rushed into a fight with the WK without thinking and it caused his end.

While Faramir was more like Denethor, and as we see Denethor who seems capable of fighting he played much more of a strategic role in defending Minas Tirith.

I think it's clear that Boromir was the better fighter, but that is an interesting question you bring up. It's sometimes good in a battle to act quickly and make quick decisions, but also you point out you don't want to be anxious and jump into something you're not prepared for. Which was certainly Boromir's style. I wonder if Faramir and Boromir fought together a lot, as they did in the battle before Boromir had departed. This would sort of counteract Boromir's rashness.

It also depends upon the situation. For fighting in the woods or where you can trap your enemy in a condensed place guerrilla warfare would be a much smarter move and seems to be Faramir's specialty. This of course requires patience and strategy to lure them into a place where they don't want to be and you can trap them.

However, when facing a siege or squaring off in an open battlefield there isn't much time to think. You have to go in with a strategy and you have to act quickly as it's all about trying to out play your opponent. So there's certain situations where guerilla warfare would be a better tactic, and other times when you just don't have the time to think you have to act.

But, you bring up a valid point.