<i>Regtrace is basically a debugging tool (like Windbg) and trace.atf file is like a user.dmp file. However, they contain different types of data in them. User.dmp has specific 2 GB worth of virtual memory address space (typically from 0x00000000 to 0x7FFFFFFF, unless / 3GB switch is enabled, in which case, it will be 0x00000000 to 0xBFFFFFFF) for specific process, e.g. Store.exe. On the other hand, Regtrace records the activity of what functions get called, and what results get returned from these function calls for each component, e.g. Advanced Queuing (AQ).</i>
Could you move the section I just quoted into the first answer? As written, the answer tells you that Regtrace is a debugging tool but doesn't tell you what it actually does.
Great article, great info! Thank you very much.