It matters.
While the CRR and watts on BRR might not be absolute, the deltas are probably pretty good when doing comparisons.
I get tons of miles out of GP4000's, and assume 5000's would also. I wouldn't commute on them. But for training and racing, yeah.
It's not data, but I've put out power PR's on some personal segments by over 40w before only to still be slower overall......because I was on my "gravel/multisurface" setup with Gators on the bike. Wind those days being negligible.
Also, difference when I was TT'ing practice on a tubular Conti sprinter was dog crap CRR compared to a race tire. It can be shocking how much it matters.