They look like iWaver 01/02 boards that have had the FETs swapped. It’s definately not a Kyosho board as the Steering drive FETs aren’t right.
Personally I would say you’re better off with having a Kyosho board modded for you using a FET stack not just a replacement of a pair.
If you need a new board altogether then you need to weigh up the performance of the iWaver boards compared to the Kyosho.
I would advocate getting the FET transplant done locally on an existing board, and instead of a single that will offer only a small gain, use a small stack (3×2 for example) for optimum performance.
A.