Redline Reviews gives the 2025 Audi S6 a strong 87/100 rating, praising its exceptional value—costing only $3,000 more than the gas S6 while undercutting competitors like the AMG EQE by nearly $20,000—alongside impressive cabin technology like customizable LED daytime running lights and an electrochromatic panoramic roof, plus real-world range of nearly 300 miles. The S6 delivers solid performance with 496 hp standard (543 with launch control) and 0-60 times around 3.7 seconds, while build quality impresses with tight door seals and an absence of squeaks or rattles. The main drawback is the controversial exterior design, particularly the single-frame grille and divorced headlight styling that Redline considers "the worst part of Audi's new EV design language," along with somewhat limited livability features like a tiny 1 cubic foot frunk. The S6 is ideal for buyers seeking a luxurious, tech-forward electric sedan that delivers performance and value without sacrificing range or comfort.

Auto Buyers Guide gave the 2025 Audi S6 E-tron Sportback a highly positive 84/100 score, praising its performance and design as standout strengths—particularly the one-pedal driving capability, paddle shifter regenerative braking customization, and aggressive geometric grille design that distinguishes it from the A6. The cabin technology scores well with its innovative passenger screen and customizable animated headlights, though the reviewer expressed reservations about the shiny black plastic trim on door panels and front end. The spacious 194-inch frame, adjustable suspension with 1.6-inch travel, and practical 26 cubic feet of cargo space make it livable for daily use, with cabin tech being the lowest-rated dimension at 71/100. The S6 Sportback is ideal for drivers seeking a sporty, understated daily driver that balances performance with practicality without the extreme aggression of the RS6.