The TSB/TSS chart with daily granularity on intervals.icu is way better. A TSS chart that snaps to calendar week increments is useless if you take a one week rest that spans two calendar weeks, for example. I’ve never gotten any value out of the TR TSS chart - it’s also so vertically compressed that it’s hard to see anything in it at all.
And the most interesting and unique feature is the relative percentile best efforts against the user base. Very interesting to see strengths and weaknesses. Not totally scientific but pretty unique insight.
Other stuff like the calendars and PR charts and ride power curves are way more polished visually in TR and better overall design interface IMHO.