Video Cards, againSo, a couple years ago I knew everything there was to know about graphics cards, and I was the guy giving advice. Now, somehow, I don't have the slightest idea what video card...
Your numbers don't work. the first gun is only 100-4 = 25 dps, and the second is 40-1.3 = 30.76 dps. We could change them to 200 damage, 4 speed (50 dps) and 45.5 damage, 1.3 speed (35 dps).
Now, shoot the first gun once (4 seconds) 200 damage (400 if crit). Shoot the second gun 3 times (1.3 * 3 = 3.9 seconds) 45.5*3 = 136.5 damage (136.5*2 = 273 if crit)
As you can see, the first bow does far more damage - which is consistant with its higher dps rating. Generally, the gun with the highest dps rating will do the most damage no matter what its speed is (this is not the full truth, but it works in most cases).
Another consideration is that the second bow will eat through your ammo three times as fast as the first one - this means that you will have to return to town three times more often, and spend three times more money.
A tradeoff in PvP is that the first bow will produce big crits, but the second will make it much harder for the caster your are shooting to cast a spell with casting time because of the frequent interruptions (well, if we upped the second to 65 damage, 1.3 speed (50 dps) then this would be worth considering - 50 dps vs. 35 dps isn't).
Lastly, some hunter skills such as Multi-Shot are instant cast and does weapon damage + some amount. These skills does not take the weapon speed into account, and thus work much better with weapons with very high damage ranges - and high damage range generally means slow weapon. There is also a thing called Ranged Attack Power that actually works out to give the slow weapons an extra edge here, but that is a math heavy explanation for another day.
-- Regards Simon Nejmann