My experience is similar. I've purchased a few Hock O1 blades and chip breakers, and used one PMV11 blade from Veritas in my jointer plane. The Hock blades are a big step up from the from the original blades. The Veritas PMV11 blades are even better for edge retention and require less prep to be ready to use - you will need to polish the back of the Hock blades, it's nothing crazy like with some of the original factory blades, but it's a step you'll want to perform.
Both Veritas and Hock chip breakers are also way better than the the original ones, and only require minimal tuning (I like to sharpen the front edge of my chip breakers - they aren't always as acute as I'd like out of the box). I don't think you'll notice any difference in performance between either the Veritas or Hock chip breakers. I have not yet run into a plane where I actually had to to open the mouth with a file to accept the thicker Hock or Veritas blades.
A word on sharpening - PMV11 is tough to sharpen, and since I do all my sharpening by hand, I really try hard not to let it get very dull. Any of the higher quality replacement blades (Veritas, Hock, LN, Woodriver etc.) will be more work to sharpen by hand than the original blades, so keep that in mind.