Dataprobe Remote Reboot products are UL Listed. This means they are tested by Underwriters Labratories and Certified to meet their exacting standards. It also means that the tests conducted are appropriate for the type of device under test. Only devices that are tested and pass all the tests conducted by UL can apply the UL label.
Dataprobe PDUs are listed under UL 60950-1, and as such are designed for stricter data center environments. Only UL 60950-1 insures that PDUs offer appropriate branch circuit protection.
Other companies use independent labs that test to UL standards. These may or may not be the appropriate safety standards. It is very easy to say tested to UL standards, but that might be for noise emissions or something other than fire safety. Some companies completely forgo safety testing!