In my opinion and after real experience in both cases, I must admit that Legacy BIOS mode is FASTER then UEFI BIOS, because UEFI use additional partition on SSD, which slows down performance of Windows 10.
Maybe, measuring boot times goes on UEFI side, but after that, performance of Windows is significantly faster with Legacy BIOS mode.
Your BIOS mode you can check with Run command : msinfo32.
Maybe, measuring boot times goes on UEFI side, but after that, performance of Windows is significantly faster with Legacy BIOS mode.
Your BIOS mode you can check with Run command : msinfo32.