I have spent a lot of time with both drivers in the simulator and out on course. Long story short I found the TC to be just a bit longer. I have the 9.5 and the 10.5 of the ISO-T and several shafts for the TC.
On a tight narrow course I would bring the 10.5 ISO-T. On a course that had a lot of dog leg rights I would bring the 9.5 ISO-T. But for a course with a mix of both its the TC.
I really have no problem gaming either driver. I like the feel of the ISO-T better than the TC. The ISO-T tends to be fade bias for me. I really have to work to turn it over. TC seems to be more versatile. Sound wise between the two its a tough choice and if forced might chose the TC.