Please note, the actual characters portrayed will not look like the ones in the image. It will be similar and there are more polls for each.
A. Castraferrum Pattern Dreadnought
Doesn't feel that long ago there was no other pattern for the Dreadnoughts. This is by far the most common and I believe only 12-14 feet tall. A regular Space Marine average around 7 feet tall. Still, a pretty gnarly thing despite it's slowness.
B. Contemptor Pattern Dreadnought
You can feel the contempt he has for his enemies. Around 17-20 feet tall, a regular Space Marine only goes about to the top of that knee pad. An older Dreadnought, incredibly ancient, these things are pretty rare. They're also tougher, stronger, nimbler, and faster than the common Castraferrum Pattern, let alone taller.
C. Leviathan Dreadnought
One big ass mothersucker. The rarest of the rarest Dreadnoughts, the Leviathan. At least 5 feet taller than the Contemptor. Sports the heaviest weaponry, pretty damn slow, but devastatingly stronger and more durable than a Contemptor. You not only need to be the most honored of Space Marines but probably one of the craziest too since these things aren't your average walking tanks, let alone how rare these guys are. This is your walking company of tanks. Unlike the other Dreadnoughts, Leviathans are siege specialists and are usually assigned as a line breaker or the spear tip of your assault or going into a fort and burning everyone out before the backup arrives. Virtually a walking wrecking ball for offensive measures, without Miley Cyrus hugging onto it.
Please note, all votes will be considered one vote, regardless of tiers. I will publicly allow anyone to vote on this since this isn't adult stuff.