I've been on HubPages for over 17 months and just got my first payout (well, it will be in my bank account in 3-4 business days) of $51.26. I've been on Bubblews for almost 4 months and have been paid over $78.00.
I'm not tech savvy enough to drive people to my hubs, so, although I like the format very much, I see very little activity here. On Bubblews, there's a "social networking" component that drives your income. You interact with other bubblers, and that helps produce income.
Bubblews allows, in fact encourages, shorter articles. They can be meaty or superficial and you'll still get some activity. I like the creative component of HubPages that allows for pictures, sidebars, polls, etc., and which is lacking on Bubblews, but I get a lot more activity and income there.
Plus, I've had fun writing some goofy stuff. My hubs are all fairly meaty, but my bubbles are a combination of meat and appetizers. I haven't written a new hub since I joined Bubblews, but that's not to say I won't in the future.