I think they both detected my Sicilian ancestry fairly well. I have one Italian ancestor - my maternal grandfather - who was born in Santa Lucia del Mela, Messina. Many related ancestors were from there and, more or less, equally so. from the nearby comune of Saponara, Messina. I have numerous civil records that trace to 5th generation Italian on this maternal grandfather's line.
Anyway, currently, 23andMe has me at 20.2% Southern European, which consists of:
Italian - 10.3%
Spanish & Portuguese -3.9%
Broadly Southern European - 6%
Total - 20.2%
Under the sub-heading for Italian, it further shows evidence of ancestry form multiple Administrative regions, the 1st being Sicily, the 2nd being Calabria, the 3rd being Apulia and so on. All told, not quite the "25%" that some incorrectly expect with a given grandparent, but I'm nonetheless satisfied with these numbers.
As for Ancestry, they show me as 12% Italian, with a "range" of 1%-14%. Not quite the percentages I think they should be, but originally they were 18% and, for whatever reason, were adjusted downward with the last update. However, they show the prime location as being San Marino, which I find curious (odd). I have to say, therefore, that I think 23andMe has fine-tuned" my Sicilian ancestry better here.
I do have quite a few Italian matches from both sites. My strongest match is at 23andMe (1.43% - probably a 2nd to 3rd cousin), but there are a few more total matches at Ancestry. Not too big a gap, tho', so I'm good with both sites in this regard.
it all therefore comes down to a personal choice. If I were you, I would say "do BOTH!!!"
