QC is "Powered by TD". They are not the same yet, but the word is that the next release QC10 will be just that. There will be no more TD. QC was initially the nice user-friendly front end for TD offering a few more features than TD itself, like running on Linux. But next year they will be fully integrated, at least that is what Mercury is saying.
Success is the ability to go from one failure to another with no loss of enthusiasm.
~ Winston Churchill ~