The difference is that these only measure blood sugar, while the new system also measures ketones, of keto diet fame, which are leading indicators of a really dangerous situation called diabetic ketoacidosis. It's treatable with a hospitalized IV insulin drip, but can be avoided if you have some advance notice.

Those ‘only’ measure glucose levels. As the article says, this is the first approved device that monitors both ketone and glucose levels.

These are the same CGM technologies (Dexcom = Stelo and Lingo = Libre), just aimed at the over the counter "health and fitness" market.

This is not verified info, but I would assume these are either A) the exact same device, just with different marketing B) "binned" production runs that did not meet the accuracy threshold for clinical/prescribed use, but are otherwise "good enough" for someone looking to healthmaxx.

No FDA authorization I guess