The Vario is the grinder everyone respects but nobody buys anymore. It'll run for a decade without a hiccup, and the W+ model's grind-by-weight feature actually works, but retention is messy, coarse grinds come out uneven, and newer flat burr grinders at the same price just do more with less fuss. Buy it if you find a refurb under $300 or you prize Baratza's legendary repair support. At full retail, the DF54 and Eureka Mignon have passed it by.
The Atom 75 is what happens when a commercial workhorse gets quietly adopted by home espresso obsessives who got tired of waiting. It grinds a 20-gram dose in eight seconds, runs whisper-quiet, and somehow keeps retention to 2.3 grams despite 75mm burrs, a combination that usually requires sacrificing a small appliance to the coffee gods. The height will not fit under every cabinet, and you'll want a dosing ring to catch the occasional escapee grounds, but those are the only real compromises. If you have the counter space and the budget, this is the grinder that makes you forget you ever cared about grinders.