I got the DL 3, and sent it back and got the Evo. The killer for me was that you can’t swap the support arms over on the DL 3. I find it hard enough fitting various combinations of bikes on and I think not being able to swap the arms would make it impossible to fit some combinations. Plus when you come to load the third bike and realise that you forgot to feed the arm through the frame of the first, you don’t have to start from scratch.
The bikes do lean together a bit on the Evo which makes things harder. I don’t know if this is any better on the DL 3. You can make a bit more space by loading the bike with the narrowest down tube first.
On the downside, the Evo is heavier, which may be an issue if you’re close to the limit on tow bar weight.