Wilson Tour Ball: The club standard, honestly assessed
Not the most exciting ball. The one clubs actually use. There's a reason.
Clubs don't buy the premium match ball for training sessions. The maths don't work. They buy a ball that survives eight sessions with five different pairs of players, and the Wilson Tour is the most common answer to that requirement.
The durability data from Reddit threads where club managers discuss equipment is consistent: the Wilson Tour outlasts most competitors in pure sessions-per-ball terms. The extra-duty felt resists wear on aggressive clay courts. The pressure stays usable longer than alternatives at this price.
The trade-off is feel. Players who've trained with WPT-approved match balls and then pick up the Wilson Tour describe it as 'functional but flat'. The feedback is blunted. The contact information you get from the ball is less precise. That matters less than you'd think for training drills, and matters a lot for technical sessions where you're developing feel for spinny shots.
For club administrators: it's the right call. For individual players buying their own training balls: spend a bit more and get the NOX Pro Titanium or Babolat Gold instead.