The 7-GUIs suite looks better, but so far only one JS framework implements it. The problem with more realistic benchmark apps (or suites) is that they require more effort to implement, so you have a selection bias towards easy-to-implement yet too-small-to-be-useful demonstrations like TodoMVC.
About 100-200LOC to implement, does recursive views, xhr, routing, dynamic state tree, and the server periodically responds w/ errors (on purpose) to force you to implement loading and error states.
I rather like https://github.com/staltz/flux-challenge myself, but I wonder if there are any other projects that are focused on more complex examples.