Most stemless pieces will have more diffusion than a piece w/ a downstem. Not to say that that's always true. There are no real advantages that I can think of other than that.
[quote name='"Payne1020"']So stemless are better?[/quote] It's all preference. There are good and bad stemless bongs and good and bad stem bongs. It depends on specific bongs and what you want.
Personally I prefer stemless bongs because its one less thing you can break, one less thing to clean and they usually have better diffusion.
well i have one of each it just depends what you are looking for.... stemless deff rips way faster than stem. i have a showerhead downstem which is nice as fuck, but still my sgw waffle(stemless obv) rips waay niiiicer
Looks like stemless has the most votes. Can't argue with them cause I have only smoked out of one stemless and it wasn't that good.