I've done some benchmarks on Luna, Sol, GoDaddy, and A Small Orange, just for fun to weigh in on performance. Mind you that Sol and Luna share the same physical hardware, so the comparison between Luna and Sol is on the merit of software alone (PHP7, Event MPM, RHEL 7.2, etc). These are stock WordPress installs without any additional configuration.
These samples were taken via webpagetest.org. Each test was repeated 9 times to get a decent arithmetic average.
Parenthesized terms are standard deviations in the sample. Lower standard deviation numbers indicate a more consistent response pattern.
Next req is a the request repeated again, which should reuse the connection (keepalive request) and skip some overhead in producing the page (e.g. hot filesystem caches, keepalive, first-run data fetched). Next req paints an ideal picture of how a server will respond to pulling down supplementary assets (CSS, JS, fonts, media, etc). Lower numbers are better.
TTFB is the time for the server to send back the first byte after request headers are sent. Lower numbers are better. TTFB averages should be consistent between first and subsequent requests with a low standard deviation. Differences may be explained by a noisy server or poor optimization.
Avg (first req): 993 ms (134 ms)
Avg (next req): 279 ms (58.9 ms)
TTFB (first req): 168 ms (111 ms)
TTFB (next req): 123 ms (50 ms)
Avg (first req): 1264 ms (135 ms)
Avg (next req): 577 ms (62 ms)
TTFB (first req): 392 ms (18 ms)
TTFB (next req): 392 ms (25 ms)
Avg (first req): 1352 ms (287 ms)
Avg (next req): 505 ms (35 ms)
TTFB (first req): 392 ms (271 ms)
TTFB (next req): 295 ms (8.63 ms)
Avg (first req): 962 ms (138 ms)
Avg (next req): 246 ms (16 ms)
TTFB (first req): 80 ms (7 ms)
TTFB (next req): 79 ms (3 ms)