I agree completely with that: the title or official description of the tour matters less than its actual features (prize money, ranking points, draw strength). We know, for example, how little the title "World Pro Championships" mattered at Cleveland.
If the 1964 tournament series was short on prize money, lacking in top player participation, and gave out no ranking points, then no mere title is going to give it an importance that it doesn't have.
Conversely, if the series had all those strong features (and it did), then no lack of a formal title such as "championship tour" can detract from its significance.
I think you're probably right about Zurich consisting of stands, rather than being a tournament. What's confusing to me is why no match results are reported for Laver and Rosewall, both of whom are mentioned in the article as having arrived with the troupe in Zurich; even their returns of service are described, as if someone had seen them play some matches there. I'll post more of the article in a separate post (just some rough translation using Google Translate).
The article was a feature almost entirely about Pancho Gonzalez and his return to tennis, so perhaps that is the reason only his results are reported. As I say, French newspapers had very spotty coverage of tennis -- which is why I think it's likely that the entire first week of September could have featured stands in Zurich and other places in Switzerland (or France), before French Pro began on Sept. 8. I don't see why the pros would not have put on stands in the meantime, while they were waiting for French Pro to begin. It would only have earned them more money.
As for Nairobi, you could well be right that Rosewall departed for home directly from South Africa. If the troupe played in Nairobi, they probably played there at the start of November, flying from South Africa, on their way to Cairo.
Maybe you know of this already, it's a letter that Rosewall wrote to World Tennis at the end of the year:
Home again, at long last, and it’s [good] to be back. Wilma was in Europe for [___] months. The break from the children [was] the hardest thing for her to get over [and] making up her mind to come away [with me] made her bring her tennis things and she got in a couple of games during her second week away, but after that her tennis was over. She is no indoor player; she likes something a bit slower—like me!
The tour went very well. Pat Hughes did a great job organizing tour matches and tournaments in France, Italy and elsewhere. Owen Williams also did beautifully for us in South Africa where the last three weeks of the tour took place. Actually, Rod, Butch, Alex and Andres played additional matches in North Africa for three weeks, before heading for home.
The NSW Championships are starting and I will be doing some of the TV commentary the final two days. I will also have a chance to talk with Roy for the first time in over a year. I look forward to seeing him play, too. Jack Kramer wrote me that he was very impressed with Roy’s play in Cleveland. Unfortunately, there is no one to make Roy even stretch this season.
Ken Rosewall
Sydney, Australia
Still I think it's technically possible that Rosewall went home from Nairobi, though not likely. I think you're right that he went home after "clinching" the points race in South Africa.