I suppose if I were to borrow my BIL's leica I could benchmark the leica Digital rangefinder with my pentax system, and compare his 28 and 35 with mine.
SHort of that, I can offer one comment made by a sales person at Henry's downtown Toronto store. He is a long time pentax user, and had a customer who shot leica. Many years ago, he did a head to head with his customer's camera and his, and processed the shots, having the customer pick which camera / lens took each shot. he picked pentaxc over leica virtually 100% of the time.
take this for what it is worth, a story passed from person to person