Comparison
The Celestron EdgeHD 800 OTA is the clear winner for nearly every amateur astronomer. The single most important differentiator is optical performance; the EdgeHD 800's scores across planetary observation (69/100), astrophotography (66/100), and deep sky work (59/100) demolish the NexStar Evolution 6's anemic ratings (18/100, 26/100, and 15/100 respectively). This isn't a close call. The EdgeHD 800 also costs $295 less while delivering an 8-inch aperture with superior optics in a compact 1.2kg package suited for transportation and backyard use.
The NexStar Evolution 6 appears to be a computerized all-in-one system with built-in power and tracking, but its dramatically poor scores across all observational categories suggest either engineering compromises or fundamental design limitations. At 26.67kg and $1,995, you're paying significantly more for a heavier scope that performs worse optically. The Celestron EdgeHD 800 OTA should appeal to serious amateur astronomers seeking excellent planetary and astrophotography work with genuine portability.
The NexStar Evolution 6 might interest only those prioritizing extreme convenience and automated features over actual observing performance, though even those users would be disappointed. Choose the EdgeHD 800.
Why choose Celestron EdgeHD 800
Why choose Celestron NexStar Evolution
No significant advantages identified.