PC's typically have higher graphical settings, higher resolutions and usually are expected to run at nearly double the FPS.
Because the settings they give are not available in the console versions of games, it is hard to say what PC setting is comparable. Medium to high settings, when ultra settings exist on a PC, is likely where the new console versions currently reside, and they typically run at 30 FPS.
Yes, consoles will always get a little more performance out of the same hardware that a PC has, but that gap may be shrinking, especially when DX 12 starts getting used.
You can't just say a PC is X% faster, but most $600+ PC's are capable of at least the same power or more than a console. High end PC's are doing a lot more, often asked to play at 60-144 FPS compared to 30 FPS, at resolutions up to 4k, instead of 720p to 1080p.