Alright, after a little bit of experimenting I have an update for you folks. It seems that the conical (GVG) ceramic filters are a little bit smaller than the cylindrical (VG) filters. When I use the cylindrical filter, it sits on the little lip in the GVG, rather than at the very bottom of the bowl. The smaller size of the conical filters allows them to sit at the very bottom of the bowl, much like the small ceramic flavor discs. But because the conical ceramic filter is slightly larger than the small flavor discs, it will still cover the hole when it slides around in the GVG bowl.

So in conclusion, it really comes down to personal preference. The cylindrical (VG) ceramic filters sit closer to the heat source, and the conical (GVG) ceramic filters sit further away from the heat source. I encourage people to try both, and determine which one makes it easier for them to vaporize a dose in one hit. I personally still prefer the cylindrical discs because they sit a little bit closer to the heat source. :thumb_up:

EDIT: Anrchy, both the VG and the GVG ceramic filters fit in there nicely, but they are also both easily removable.