The TPA6120 does have something important the NJM4556s in the O2 don't have. Short circuit and thermal protection stated in the datasheet.
Lord V expresses confidence that they will survive a short circuit and states that he performed tests on which he based his conclusions. Perhaps he's right. In my experience, however, datasheets are quasi-legal documents now as well as being promotional material, and in the nature of things, if a device really has a particular feature, it will be stated in the datasheet, and vice versa.
I'm retired now, but I do know that when I was working, my line manager would not have accepted my assurances about a device surviving short circuits unless it was stated in the datasheet.
Consequently, if I'm designing a piece of equipment, even for amateur construction by enthusiasts on a forum like this, if I want to be able to give the assurance that it will survive a short circuit, I don't employ NJM4556s in the output stage.