I think the issue is when WC states that the vts is the best option out there. Better than the C-Diff.
But he hasn't tried the C-Diff. So how can you comment?

That is also throwing off newer readers who are not aware of WC solely running AE parts or the odd one off where a pro will use an aftermarket part... that one is now good.

If I have used one part without trying the other, I would not give an opinion on which is best. I think that's where Marcus gets frustrated. If someone comes on here and says that they tried it and it was not for them the most you will hear out of Marcus is making sure the part was assembled correctly and operating as intended.
Past that, the C-Diff is not for everyone or everywhere, Marcus knows that, to each his own. I like it indoor and love it outdoor, but that's me.

But I would hope that besides WC, no one would state that a product is inferior to another without using both.
If they have tried both, thank you for the review