>>2946867By blad knockoff do you mean cameras that are essentially copies of Hasselblad designs, or all 6x6 modular system SLRs? There are tons of cameras that look superficially like a blad, but are actually very different.
The Rollei SL66 has bellows focusing with tilt movements and reversible lens mounting. The 6008 has a motor drive and multi-zone metering.
The Bronica S and E series cameras have a unique focusing system with the focusing helical built into the camera body. The E series add electronically-timed focal plan shutters and TTL metering, but also work with leaf shutter lenses. The Sq series has modernized ergonomics and uses electronically-timed leaf shutter lenses.
Even cameras that are overall very similar to blad designs typically have some notable differences. Hasselblad steadfastly refused to make simple ergonomic refinements for decades, like darkslide holders, decent focusing screens, instant return mirrors, separate shutter speed and aperture controls, etc. So older blads have a lot of ergonomic quirks compared to similar-aged cameras from other manufacturers.
Then there are the cameras that look like big 35mm SLRs, like Pentacon 6/Praktica 66/Exakta 66 and Kiev 6. And there are probably hundreds of models of folding cameras that came in 6x6.