When I started ripping Blu-Ray discs, I switched completely from RipIt to MakeMKV. I like the fact that MakeMKV produces a single file per title on the disc, rather than duplicating the full file structure of the disc. The downside is that you lose the disc's menus and navigation.
The quality of RipIt and MakeMKV files will be the same as neither one re-encodes the video or audio tracks.
I haven't noticed that one takes longer than the other, but I haven't really run a test. I suspect that the time required to rip is mostly dependent on the optical drive. An external drive will probably be faster than a "rip-locked" Mac internal drive.