This is a subjective answer.
Similar to asking if you prefer a dyed, hybrid or ceramic tint. Each type has a different look & or/ performance to it.

Installation of precut/vs. custom is apples & oranges as well with PPF film.
Will they *polish* the paint to perfection before applying the film vs. just a PPF installer who will just clean the paint and apply.

Back on topic....each has it's pros/cons. If I had to have a choice I would choose the Llumar for clarity but I want a clearcoat that 3M puts on their film.

3M bought Venture afaik.

Consider the *installer* 70% of your decision when going with PPF. Film is important but installer is even moreso IMO.