Hello Thomas,
One of the data sources used in WIPO's IP Statistics Data Center is PATSTAT.
This is documented at this link:
https://www.wipo.int/ipstats/en/help/
So there is for sure an overlap on the data; we also know that addresses for PCT applications in PATSTAT are often missing, so I assume that WIPO's PCT data is more complete then the PCT data in PATSTAT. WIPO also states that the data of PCT
FILINGS is up to date to about 3 months. I would conclude that WIPO publishes statistics on un-published applications which we don't have available in PATSTAT. (EPO only publishes aggregated information on un-published applications via the annual reports and facts and figures.)
This probably also explains why no graphs on the WIPO tool show applicant names. (But kindly contact WIPO if you need more background information on their platform.)
The advantage of PATSTAT is that you can drill down as deep as you want in the data. For each single application you can examine the very details if your research requires it. As fare as I can see (10 minutes playing around with it), this is not possible on WIPO's IP Statistics Data Center.
A disadvantage on working with PATSTAT is that you need to know SQL, you need to understand the data coverage and possible pitfalls and you need to know the basics of the patent granting procedure for each authority that is included in your data.
So my conclusion would be: ... it depends on your use case....
WIPO's IP Statistics Data Center is fine if you are happy with some quick statistics and graphs, without the need of having to provide details or the risk of being questioned or challenged. You are an undergraduate and need some data to back up your research coming from an established source... fine.
But if you are doing an in-depth patent analysis; you might be challenged and you will have to defend your results, possibly even document possible risks in your analysis : PATSTAT would be my preferred data set.
But for straightforward un-complex data sets, I assume there should not be day and night differences in the results between the tools.
I just was pointed to your tweet on the same topic. Can you share the SQL query you used in PATSTAT through this post ?