To be honest I rented both lenses and shot a few shots around town and in the studio. The prices jump rather quickly when you go in that wide of an aperture. I actually ended up not spending the money and bought the 85mm 1.8 usm model for several reasons. One it was 249.00 on B&H where the others were bringing in over 1300.00. The quality of the photo was not good enough for me to warrant spending that kind of extra money. Yes the 1.2 did have a slightly better creamy background look but you can achieve that also by moving the subject away from the background instead of right against it. As far as the focus goes. I really could not tell the difference between the lenses as to which focused faster. They all seemed fast to me. I tried these lenses on a Canon 6DMarkII. In the end I believe really the choice is how much money do you want to spend. If it’s just to take photos of the grand kids then I believe I would buy the lesser and put my money into something else like possible lighting and tripods.