I got mine from Sunroof Doctor as well. There were no options as far as I know, just the one style. It does have a small lip but it's nothing like the factory one.
The installation was pretty straightforward and no, you don't have to drop the headliner. You have to slide the partition back, vent the roof and remove the screws holding the glass to its rail. You may need to readjust the glass several times throughout the process. I'll add as well that a pair of helping hands might speed up glass re-installation. The old seal might not come off very easily but hey, it's getting replaced anyhow. Just make sure you clean the surface well before installing the seal. As far as the lip, you just have to be mindful and guide the seal on as you're installing it so it stays flush.
Overall I'm pretty satisfied with mine. It's lasted through two rainy seasons and the scorching Arizona sun. They also sell the rail assembly with trough which I've thought about buying, and the seal comes with plenty of extra material in case you need to patch a spot... or you decide to make a smaller sun roof to keep the moon roof company... totally up to you.
Either way... No more water down my back! I'd call that a win.