Perfecticus fighter is flawless but has many less options to it
Dream fighter has many more options to it but doesn't run as smoothly. Also if you do decide to go for dreamfighter, forget about rsbots.net and get it from oembots.com because it's cheaper and the same script.
Well, when you're standing in an area full of monsters, there's a 'refresh' button (or something of that sort) on the GUI. Once you click it, it'll list all the NPCs that are around you. You choose the one you want, fix the settings the way you want it, and hit start.
Perfect Fighter hands down. It's flawless and its coded perfectly with a lovely anti-ban. It's probably one of the best bot I've botted with.
Pretty much its quantity vs. quality.
Rsbots.net has some great bots, that won't get you banned and will be reliable, but rsbotting.com has quality bots.