I agree about having a basic theme but personalized to the wearer... Most importantly, you do want to be recognizable as a mando, so you'd want to keep the most notable things the same (helmet, chestplate, etc), but the details could still be changed quite a bit without making your armor unrecognizable. As for the armor looking -exactly- like jangobobajodo, I do think that's just for marketing of toys. Easier to repaint than re-sculpt, so of course they'd take the easy way out. Tell an artist not to worry about cost, though, and you'll get recognizable but not identical.