I've been using XnView for this on Windows, it has a side-by-side comparison mode where zooming into one image zooms into the other at the same time, so you can take several pictures of the same scene, then compare details side-by-side and delete the inferior ones until only the best is left. ...

It's been almost six months since this post promising Generating revenue from non-technology sites will enable us to dedicate more resources to meeting your needs so this is good news. (Emphasis original) ... and two months since the last update from Stack Exchange staff to What can Stack ...