DOES THE HDK SUSPENSION K-MEMBER HANDLE BETTER THAN A T-BAR SUSPENSION?

Saying the HDK "feels stiffer" is 100% subjective.
Of course it is because there is no measurable value for human perception. However, as previously mentioned, my passenger who has been in the car for many miles commented that it "felt better". He was simply a passenger with only his *** being the connecting point to the car, no steering feedback in his hands. I wish I could explain it, but I can't. The only thing I can offer is a passenger seat for you to feel on your own.
higher wheel rates than what was previously run on the torsion bar suspension, and better shocks.
I originally had springs of similar wheel rate to my 1.08 bars. Are the QA1 shocks better than the Fox Hotckis? Sure the double adjustable makes it more versitile, but is there damping actually better? Likely another subjective comment unless someone has compared the two on a shock dyno.
I've never heard of an RMS AlterK
Likely my mistake. I've seen photos of fractured shock towers. Perhaps it was another brand.
What I would really like to see is a full plot of the toe change, camber change and roll center,
I'll see what I can do about the toe change and camber change through suspension travel. That will take some time to measure. I also need to educate myself on the proper way to measure toe change with simple tools. I think the best way to see the roll center change would be to use the online tool.