Interesting, I have the opposite experience- my Goliath 2 whistles unless it's wide open, my Bellus does not whistle at all.
Thanks to all who offered suggestions about the seeping after a refill. I've got it to the point where I can refill it with minimal seepage- but doing so requires more care and attention that I'd like, and a little more cotton than what I find optimal for the actual vaping of this thing (as the seepage is during filling only.)
I do like the side airflow- for me at least it produces less noise than the Goliath, and I also find coils gunk more slowly (which I think is a function of how much air is hitting how much surface area of the coil.)
However, after a few days of using the Bellus I'm going back to the Goliath v2. The pros outweight the cons, for me, though that doesn't seem to be a popular opinion.
I mostly wanted the Bellus as an upgrade to the G2 so I could top fill on the go, and not have to use a needle tip bottle. The amount of effort that takes negates the advantage though.
The airflow ring is too loose. I often find myself turning it accidentally with just the lightest touch, and that's a pain on the xvostick because I have to take the Bellus off the mod to adjust the airflow.
I don't like the snap on deck. Some seem to find it convenient, but I find it much harder to grip when trying to screw or unscrew it from my ohm-reader, and then I end up putting fingers all over my wick. To me, Goliath 2 wins again in this department.
My preordered one from 101vape arrived today, the one I've been using I got from Origin because 101 was taking too long and I didn't cancel theirs. I regret my impatience. I'll see if i can return /exchange it (unless someone in San Francisco who wants a Bellus wants to trade me something for a new-in-box one.)