Bruce, being a coarse fisherman as well, like myself, you'll know the advantages of fine mesh fish-friendly nets, which is presumably why you've flagged this up

Another vote in favour of fine mesh for C&R. This has been standard practice in coarse fishing for many, many years but for some reason, has, as you say, has been largely overlooked in game fishing

Also knotless mesh obviously. The only practical reason for using a slightly wider mesh, or at least not a micro-mesh base, is in fast rivers and big nets where drag on the net can cause difficulties, but that is a specific and uncommon situation for most forum trout fishing members I would imagine. Saying all that, when C&R-ing I try to avoid using a net at all, unless it facilitates quicker landing/releasing which sometimes it does.
ps - that first one doesn't actually look to bad - more "gudgeon mesh" in old coarse language - not as wide mesh as many trout nets you see