Same camera, why?

[Ronny]

6 F and 1 F2.
Different films and ISO.
http://www.flickr.com/photos/ronnypersson/6969150933/in/photostream

 

[Paul Jenkin]

I have an M6TTL and an M4-P (couldn't afford another M6TTL and found a bargain M4-P). Once I've set the aperture / shutter speed combo, they feel and operate almost identically. I use with different lenses and, occasionally, with different films.