I don’t think it is, unless it’s a massive re-design. Orrus and really all Spyrers look like people in slick power-armour suits - Orrus ones are hugely bulky but still pretty slick, almost superhero-ish. Whereas this thing looks very whirring and mechanical. At a guess, I’d say it was either a robot, something nearly forgotten in 40K (they were big in Rogue Trader!), or more likely some kind of ghetto dreadnought.
EDIT - Worked it out whilst Googling “Necromunda dreadnought” - it is kind of a robot though more correctly a cyborg - it’s an Ambot: