Hi Giovanni,
While they do basically the same thing, 3dClustSim
gives much more output, including outputs for
multiple neighborhood types.
Importantly, 3dClustSim also includes the -acf option,
to apply more accurate auto-correlation function
estimates. I see little gain in using AlphaSim, except
that it gives more detailed output to understand
exactly what the corrected p-value is.
- rick