I did notice that the LG passive 3D set produced a slightly "deeper" 3D effect than both the Vizio and Sharp sets. The raindrops in Resident Evil and the cloudy cheeseburger from Cloudy With a Chance of Meatballs both popped out a bit more on the LG set - meaning that while the choice of 3D tech is important, it is not the only determining factor when it comes to how good 3D stuff will look on your TV.
Tim's take: After viewing the three 3DTVs we used in our eyeball testing, I voted for passive glasses for a number of reasons. As Patrick mentions, the glasses are definitely lighter and more comfortable, making them better options for long 3D-viewing sessions minus the nose sweat. They also do not have the "Are these things on?" sync problems that you sometimes encounter with active-shutter glasses. Add in the fact that passive glasses are Significantly cheaper and do not need to be recharged, and they have a big advantage over active-shutter technology before you even start watching anything.
Cloudy With a Chance of Meatball What was really surprising to me is that I thought the 3D effects looked better with the passive glasses, as well. With the glasses off, I could see the individual lines of resolution on the Vizio and LG TVs in our test group, but once I put the glasses on, the screen looked noticeably sharper images on on those sets (especially on the LG) than they did on the active-shutter Sharp set.