The Stanley will be significantly brighter than an ROP, and will throw significantly farther. I don't have an ROP, but I doubt you will get over 1000 OTF lumens from one. The Stanley easily has 2000+ lumens out the front, and a lot more when it starts up in its "overdrive" mode. It also has a much larger reflector than a maglite, so it will throw much farther (like 1000+ feet). Since it is an HID light, it probably also has a smaller light source than that of an ROP bulb, since the light actually comes from an arc, not a larger sized filament.