My understanding is that the replacement foot for the collar is better balanced, but it's going to eat up my savings, not to mention that it's got an Arca-Swiss mount which doesn't play well with my Manfrotto monopod.
Perhaps you should get this Manfrotto monopod head and convert it to a Swiss Arca using the video. Then just swap out the heads on the monopod whenever you need to switch from Manfrotto to Swiss Arca.