Also, any resources or information on calculation of the sample size
for such a comparison needed to achieve a given test power?
> Does anyone have information or expertise on the comparison of
> Weibull location parameters from possibly different underlying Weibull
> distributions (2 parameter)?
Do a search on "weibull regression" + "two parameter model"?
> Also, any resources or information on calculation of the sample size
> for such a comparison needed to achieve a given test power?
Do a search on "weibull regression" + (power OR "sample size")?
You might say "but most of these results are behind publishers' barriers to
access". True, but you told us nothing about your situation (academic
library privileges or no) or your reasons for posing these questions.