Since you referred to it as the "more bulky version" of a Hasselblad, I also assume you are asking about the SL66? As someone who used both an SL66 for years and now a Hasselblad as well I can make the following comparison: Yes, the Rollei is more bulky, but not necessarily heavier. Rollei used quite a bit of aluminium and plastic of very high quality. It feels definitely lighter than it looks at first sight. The Hasselblad on the other hand is smaller and mostly made from steel, so the weight feels more concentrated. More like a brick. SL66 has a built-in bellows which allows seamless focussing from infinity to very close distances (16cm with the 80mm lens I think). Hasselblad only allows about 90cm and from then on you have to fiddle with tubes. SL66 also allows some tilt but I have not used that very often. SL66 has 1/1000 sec, Hasselblad only 1/500 (apart from the 200/2000 series). SL66 has a focal plane shutter and instant return mirror. The mirror is very well damped and the sound is softer, as opposed to the harsher, metallic sound of a Hasselblad. I also have the feeling that mirror slap is less with the Rollei compared to the 500 series, and even more so compared to a 2000FC I´ve handled. On the other hand, when using mirror pre-release, the Hasselblad wins because of its vibration free central shutter (apart from 200/2000 series with F-lenses of course). The SL66 magazines have automatic film-start-detection, which can be good or bad. Can be bad if the mags are not well maintained, if you do not pay enough attention or if you use exotic films as some reported (never had an issue with Ilford or Fuji). I like the Hasselblad magazines and the way the film is loaded better. They also seem less prone to failure. The Rollei has the better screen in my opinion (comparing both the latest High-D vs. Acute Matte D, I don´t know about older screens), because the Hasselblad screen has a shiny glass plate on top whereas the Rollei screen is all plastic and matte. It´s like with these notebook screens glossy vs matte. However, the Hasselblad screen can be cleaned more easily whereas you should not clean the Rollei screen to often not to scratch the plastic. The SL66 only has a flash sync of 1/30 sec but there were two lenses with central shutter (1/500 sec) available. Overall one must keep in mind that the SL66 was a camera that was produced from the 60s-80s, so most of them are 35-50 years old now whereas you can still buy a Hasselblad 503cw that is less than 10 years old. Hasselblad also offered some newer lens designs (50 FLE, 100/3,5, 180/4) or faster lenses (110/2), things like winders and motorized cameras ect. But there is just something about the way the SL66 feels and sounds that is very charming...