Never had a bad Schwalbe tyre...though I'm sure someone will set me straight!
The addix compound has a higher rolling resistance than the one star. I've been stocking up on these as I find they roll better than the newer ( addix) model.
Good deal... but IMO the Schwable Pro One Addix at £25 is better, because it is the latest and greatest tubed tyre from Schwalbe (equivalent to GP5000 / Corsa G+), it comes in 25mm, and its just over the free postage threshold. https://www.merlincycles.com/schwalbe-pro-one-addix-v-guard-folding-road-tyre-700c-174255.html This is a very good deal if you want two 23mms mind.
Apologies never noticed (skeptical)