Yes, I have both. They are quite similar in a way. The 50 Lux I use with confidence and I like its bokeh; I shoot mostly wide-open. The 75 Cron, I need to tread cautiously, as its shallow depth-of-field often catches me off-guard, resulting in a pic with the wrong things in focus. But, I like this lens at lot and consider it a specialty lens. Love them all.

Hola: From Valencia, do uou has tested the 75 1,4 (old). for me is similar to the 50.
Great photo
Congratulations