The vibe is the newest/latest edition and is generally heavier than the others, but I think has a few of the bug-bears resolved (stiff brake on the previous models especially). I think the e3 is the oldest with the explorer and/or sport (I have the Sport) being tweaked versions of the E3. I think I have the first version of the sport (about 3 years old) and the only difference I can see between it and the v2 Sport is the rather handy clip (on the v2) to keep it closed when folded.
Other than that, it's the difference in price!
.png "Interview With Expat Saanika Gandhi, Author of Children's Book 'The Yellow Kite'")
