The Reference is right in the middle of the Times atlas range: it’s inexpensive (£30 list, compared to £150 for the Comprehensive, £90 for the Concise and £50 for the Universal) and presumably a bit less unwieldy. The Mini, on the other hand, is positively dainty: at 15.1 × 10.6 cm, it’s smaller than a mass-market paperback! (Obviously the covers above are not to scale; see the somewhat-out-of-date comparison chart for the various atlas sizes.)
According to Amazon, both are available in Canada next month, and in the U.S. in April 2018. (If for some reason you cannot wait, here are direct links to the U.K. store: Reference, Mini.)
The Oxford Atlas of the World touts itself as the only world atlas series that gets updated every year. Unlike the Times and National Geographic series it doesn’t come in multiple sizes: there’s just the one, which is roughly equivalent to the Times Concise in size and page count but cheaper ($90 vs. $125). The next edition is the 24th, and it comes out later this fall; the changes are spelled out on the publisher’s page (adopting “Czechia” is one of them, for example). G. T. Dempsey has a review at Geo Lounge.
An explanation lies partly in Collins Geo’s apparent decision to produce the map in house. If that was the case, the firm might have avoided its embarrassment with the obvious quality-assurance step of sending page proofs to carefully chosen experts. Appropriate scientists seldom decline invitations to serve as reviewers. […]
It seems likely there was a belief that external review was unnecessary. Moreover, it seems that none of the publisher’s marketing mavens compared their provocative God’s-eye view with competing treatments on readily accessible scientific websites or Google Earth.
Hubris is not too strong a word to explain HarperCollins’s predicament. A press release promising “concrete evidence of how climate change is altering the face of the planet forever” invites critical scrutiny by mainstream climate scientists as well as the self-proclaimed sceptics who are ever eager to pounce on overreaching pronouncements by the former. In Atlasgate, the pro-warming community, which outnumbers naysayers by perhaps 50 to 1, wasted no time in trashing the HarperCollins map.