A simple, brief answer - yes, they are all interchangeable with absolutely no problems. Again, to be brief, the pecking order is 6DJ8, 6922, 7308 i.e. good, better, best.
Now is you want to find out which is the best brand of the above noted variants, that is a very complex and very opinionated question in which we will need to know more about your system set-up, application, and sonic objective.
Now is you want to find out which is the best brand of the above noted variants, that is a very complex and very opinionated question in which we will need to know more about your system set-up, application, and sonic objective.