Hi John,
I tested one of their regulators by putting a 7.5 amp load on it and the wires melted in about 2 minutes. You will not see that kind of continuous load but in my opinion they are using too small a wire, at leas for a single connection, for that amount of rated current. For the 33% you should be fine. It just depends on if you can live with the mis-match. Since they are fixed regulators it can vary from slight to extreme. The mis-match means they are set for slightly different regulation voltage due to component tolerances. One may be set for 5.95 volts and the other may be set for 6.05 volts. The 6.05 volt unit will run all the time while the 5.95 volt unit will only kick in when the load on the 6.05 volt unit causes enough voltage drop in the wire and connectors to match its 5.95 volt setting.