You will be able to run Mario Kart Wii and Super Mario Sunshine on almost anything out there that's somewhat decent, and the latter processor you listed will run them fine. If you want to play Super Mario Galaxy without crashing (use LLE) you will need an i5 3570k @4.2GHz for full speed. You could run that game at a decent speed with the latter processor you talked about getting but with HLE, meaning it will crash a lot so you would need to save frequently.
PC Specs
CPU: AMD Ryzen 5 1500X 3.5GHz
GPU: Nvidia GTX 1060 6GB
RAM: 8GB 2400MHz DDR4
OS: Windows 10 64-Bit
CPU: AMD Ryzen 5 1500X 3.5GHz
GPU: Nvidia GTX 1060 6GB
RAM: 8GB 2400MHz DDR4
OS: Windows 10 64-Bit