[rtpg]

How about: You have two teams. Each team will work on two projects, A and B together.

The first team does A in "Agile" and B in "Waterfall"

The second one does A in "Waterfall" and B in "Agile"

I bet working like this would pull out at least some interesting stuff

[seanwilson]

It would still result in basically anecdotes. Maybe team A picked a library that made life difficult for themselves or misinterpreted one of the requirements? Small things completely throw the results off.

[BigJono]

Funny you mention that. The only "methodology" I feel I have enough anecdata to comfortably vouch for is YAGNI. In my experience, whichever team fucks themselves with bad library choices is going to lose this experiment 100% of the time, agile be damned.