I've just tested db-cache-reloaded after switching from wp-super-cache and it seems to me that... Wp-Super-Cache is still faster with loading the whole pages, but I assume that DB-Cache-Reloaded reduces CPU load on the server, so my question is in the topic above.
Also I received few HTTP 500 Internal errors in admin panel and the site itself.
WP-Super-Cache is blazing fast.
WP-Cache is also pretty fast for logged in users.
DB-Cache-Reloaded's speed is rather slow, but It cached 90% of queries on every page. I guess it reduces the CPU load. Hm?