I can only relate opinions on this, but what the heck, you will be getting what you paid for.
I see that some of the serious match shooters use a drop tube. Maybe it matters and maybe not. I'm in the Maybe it matters camp but tempered with, "yeah, but how much".
probably would take a hundred shots off a gun vice to see any difference-- if there is any difference!
I've always kinda thought that the barrel served as a sorta drop tube
Over powder wads?? I've never tried either but no shortage of opinion.
They seem to be considered a good way to protect the patch. My thought is that a quality patch material well matched to the ball/bore when fired from a well conditioned barrel needs no special protection.
Just my opinion.