No, not exactly.
The BT's Beta Testing board contains the BT 0.66, BT 0.67, etc. threads with user comments to tested versions. They correspond to TTh's Testing Version 1.82, Testing Version 1.90, etc. threads.
But BT also contains the New Version thread, which is sort of BT's Release Notes (and new messages there usually consist of the striked-through lines from the What is in the todo list thread at the release time).
Whereas TTh is missing such thread (with its Release Notes), there is just the What is in the todo list thread, but the striked-through lines vanish after each next release.
[edit]Just noticed - BoincRescheduler - BoincMonitor > Beta Testing also does contain a New Version thread.[/edit]
I keep to the system that I once started.

Version info:
http://www.efmer.eu/boinc/download.htmlThe download pages are the most accurate.