Oh, everyone plays differently. I think Piratez is drawing his best from Meridian. His play is a dance, every step measured, the flow controlled, every detail important, his enemies dying artistically, he's always emphasizing raw damage over anything else, and using his well-honed dancer's moves to deliver that damage to the target.
Draco's play, in comparison, is war. He's berserking, a calm rage, he omits details in favor of general tactics (flanking, defence, not overextending oneself too much), he just plows forward with unyielding spirit and determination, mowing his oposition down, his enemies dying to the pressure of endless bullets and mortar shells. He's emphasizing pressure over raw damage. Just like a gun seems a special-use weapon for Meridian, so for Draco, grenade and melee are special-use weapons. Another big advantage of Draco is that he never fights with the in-game reality, he accepts it fully and fights the enemy instead.
Solar is the third person I've seen play Piratez, and his style is yet different, closer to Draco but still different - for example, he removes the safeguard of 'save TUs for Snap Shot' button, a thing Draco always has on, to, presumably, put a healthy safeguard on his rage
Solar is more into massed thrusts into one direction, instead of advancing frontline, thus his heavier use of shock troops (melee & shotguns & bombs), and a bit less emphasis on armor. His enemies die either to massed assaults or heavy support fire - and his heavy support advances just behind the shock troops, thus some of his heavies wear heavy armor.
As for myself, well, it's hard to judge oneself. I think I'm somewhere between Solar and Meridian. I like to dance, I don't trust Reactions, but I never completely neglect mass.
As for Boltgun, I have no idea, I haven't seen him live, but he's most likely a Beast. Only a Beast can bring down a Battleship with 2 Predators armed with glorified peashooters
Oh and a bonus for the initiated
:
Meridian: Emperor's Children
Draco: Chaos Undivided with emphasis on Khorne, and almost no trace of Slaanesh; Black Legion?
Solar: World Eaters + Death Guard
Me: Emperor's Children + Death Guard
Boltgun: Possibly Night Lords?
Hobbes: Almost surely Thousand Sons