Thanks for the helpful info; I own a GoLite Chrome Dome and was considering trying our the Birdiepal. That answers that question for me.
BTW, if any of you are trekking pole users and don't like the idea of having to stow the pole while using the umbrella, I've found a way to combine both. But you have to be willing to shell out some dough.
It is quite easy to remove the center pole from the Chrome dome; it is made of CF, and as such can be sawed in half with a regular household hand saw. The center poles removes from the top of the umbrella by removing a screw under the cap.
It so happens that the umbrella slides onto the lower shaft of a Komperdell C2 trekking pole. It will not work on regular 3-piece trekking poles, since the lowest segment is not long enough when the umbrella is closed. That's okay, though, since the C2 is the lightest 2-section trekking pole on the market that holds a person's body weight (it's the 2-section version of the BMW Stix PRO).
Anyway, if you insert the lower pole of the C2 into the Chrome Dome, and purchase a Black Diamond flicklock (sold as an accessory on their website), the flicklock clamps over the Chrome Dome base to create a secure grip. Thus deploying the umbrella is simply a matter of unlocking the flicklock, sliding it up the pole, and clamping back down. in other words, it works just like a regular Umbrella!
This will shave 3-4 oz off the umbrella, but it is just as strong, IMO. Then you don't have to fiddle with stowing your trekking pole, and I find it easier to use, since I can extend the pole and hold the umbrella from near my waist. The umbrella slides right off the pole, so removing and stowing it is quite simple.