SAA-207 has nice wide seats - but disappears after Dulles?

Archive Flight Planning
1

I’m flying from Denver to Johannesburg, and I see that on the return flight going through Dulles (SAA207) is on an Airbus 330-200 which seatguru claims has nice wide seats (19"-20" instead of the usual 17").

First question - can I trust seatguru? Is this information accurate? (with the usual caveat that if there’s a problem they might have to use a different plane)

But then I’m confused, the flight going the other way (from Dulles to Johannesburg) uses a different plane (an Airbus 340-600). Where does the A330 go after Dulles?

Thanks,
Chris