Federer debuted a blacked-out Wilson with a 98-square-inch head last week in Hamburg as he tasted action for the first time since being stunned in the second round of Wimbledon.
The Swiss ace reached the semi-finals in Germany, only to fall to Federico Delbonis in the last four.
Federer is now in Gstaad for the first time since winning the clay tournament nine years ago. He enters the fray on Thursday against Daniel Brands or Marco Chiudinelli after getting a first-round bye.
And Federer says the new racquet will be there too, as he continues to pass judgment on the equipment.
"So far, I'm happy with this change,” he explained. “But I need many hours on the court to see if this is a good decision.
“I haven't yet taken the decision on whether to use it in the US. I still need to think it over.
"There are players who have experienced problems when they changed racquets, Fernando Verdasco and to some extent Novak Djokovic."