Frank is right on here. Mold minimalism aside, you absolutely must have some speed class/flight characteristic organization to your bag to develop touch and accuracy. You can't just throw a bunch of random discs together, all different speeds/flight characteristics, and expect to get anything but lucky. You also have to consider other aspects of throwing mechanics such as nose angle, arm vs. snap, etc. On every one of these aspects, the Comet is different than the Buzzz. The throw power and line that takes a Buzzz to 300' will have the Comet grounding out at about 250', but give the Comet 10' more of height and it may go 330'-340'. Use little arm and only snap and the Comet can glide up to 300', but the Buzzz will only go 250' before it drops with the same throw. Whichever of these discs you learn touch with will end up taking over all shots, and the other will have be relegated to a single shot. You cannot learn and throw both with equal ability (unless perhaps they were the only two discs in your entire bag).
Secondly, the Comet is a stable disc, not an understable disc, and so is the Buzzz. If the Comet is understable for you (and is not beat or in the 160s), then you are throwing it wrong (perhaps like a Buzzz) and it will not be predictable.
These are the reasons why the Fuse (and even the Meteor) are a better fit with the Buzzz. The same power and line will yield a similar distance and flight with the only different variable being stability. This way you can use the same "touch" you've learned with the Buzzz and simply get the more understable flights you are looking for.