To answer your question directly:
-In terms of build quality, it's a push. The Incredible is insanely solid for a plastic phone. Despite having an aluminum casing, the Droid 2 World also has a slide out keyboard, something that's notorious for being the week link regardless of the build quality.
-When comparing the screens, you'll get dissenting opinion. I prefer the true 24-bit color and the color accuracy of the Droid 2, but others prefer the more vibrant AMOLED or SLCD (which are 16 and 18-bit respectively). This is a personal choice for you. Screen sizes are both listed at 3.7", but due to slightly different aspect ratio and resolution, the Droid 2 ends up better pixel density, while the Incredible actually has more surface area (so, technically a slightly larger screen).
-In terms of interface, you have Motoblur, which seems to be a semi-stock UI, versus Sense, which is nicer looking and offers better response. Your call on which UI you prefer.
-Keyboard vs. no keyboard (and the associated bulk that comes with it). Again, personal preference.
-In terms of hardware, you've got to hand it to the Droid 2 Global. Faster CPU on a smaller process means better battery life and performance. Significantly better GPU performance which means less visual lag in games like Pocket Legends Sims 3, and actually having a playable version of games based on Unreal Engine, like Dungeon Defenders.
-5MP vs. 8MP camera, though the quality seems to be similar, and 720P video capture on the Droid 2 seems to be a little better in terms of framerate consistency.
So the Droid 2 wins the technical aspects, but when it comes to personal preference I still slightly prefer the Incredible. You need to look at those things (screen, keyboard, UI) and make your own decision. On just hardware, I'd take the Droid 2, unless you don't play mobile games, as the faster CPU does not make up for the better UI performance of the Incredible.