RMS talks about two movements, but Simo is talking about the software: two separate things. At the moment one can safely assume that all software classified as Free/LIbre by FSF standard is also Open Source by OSI standard.
For pedants: there have been some exceptions. The Netscape Public License is FSF "free software" but not OSI "open source" as it gave special privileges to Netscape. (I checked with Danese Cooper at OSI on this question in 2002 and she confirmed this.) However, Netscape used its NPL powers to relicense all NPL files as Mozilla Public License, which is acceptable to both.
I don't know of any license that's OSI-approved that isn't also FSF "free software".
- d.