Scat are made in China, it is common knowledge now.
The price alone reflects where they are made.
Whether Spool or Scat are made in Taiwan , China , India , USA or Aus etc is really irrelevant. As the steel in SPOOL rods is 4340 ( had it tested several times ) the tolerances are perfect, the rod bolts are ARP and the quality is exceptional.
There are plenty of cars making power with SPOOL rods ( and the like ) and there are numerous workshops who recommend them ( talk to Mercury Motorsport, Proengines, Harris Engines, 6Boost etc ). Fitzpatrick Speedworks has a RB25 making 460 rwkw with those same SPOOL RB25 rods you have.