Hmmm, I never got a response to my question above. Regardless, I bought the variety pack of the SmartCore tips--the Audio Pro and Sport Pro tips--a few days ago on Amazon, and just received them. As far as I know, the SmartCore tips are a new series of tips from Comply. So far, I've only done a bit of listening using the Sport Pro tips, and it has been a long time since I listened using the original Sport Pros, but so far, I'm not hearing a reduction in treble like there was with the original Sport Pros. Maybe someone who happens to have a pair of the original Sport Pro tips and a pair of the new SmartCore Sport Pro tips can verify (or dispute) my findings.
I have yet to try the SmartCore Audio Pro tips.
Edit: Shortly after posting, I realized that on the Windows 10 PC on which I am listening to my headset, I have Dolby Atmos for Headphones enabled. I might try turning that off and try listening for a while, or switch to my iPhone, to most accurately gauge the quality of these tips. But normally I leave Dolby Atmos for Headphones on, and forget about it.