That depends of what you want. Every mode has its pros and cons:
"Emulate a BT adapter" mode: only guaranteed to work with genuine Nintendo Wiimotes, bad Wiimote speaker audio, the BT adapter remain accessible by the OS BT stack (thus you can still connect other BT devices), allow mixing real and emulated Wiimotes, less finicky save state support, works with TAS features, kinda works with NetPlay (by mapping the real Wiimote to an emulated Wiimote).
"Passthrough a BT adapter" mode: any Wiimote that works with a real Wii also work with BT Passthrough, perfect Wiimote speaker audio, the BT adapter can't be used for anything else, does not allow mixing real and emulated Wiimotes, more finicky save state support, does not work with TAS features, nor NetPlay. Results greatly vary depending of the particular BT adapter you have, perfect compatibility is only guaranteed with a real Wii BT module modded to USB.
"Emulate a BT adapter" mode: only guaranteed to work with genuine Nintendo Wiimotes, bad Wiimote speaker audio, the BT adapter remain accessible by the OS BT stack (thus you can still connect other BT devices), allow mixing real and emulated Wiimotes, less finicky save state support, works with TAS features, kinda works with NetPlay (by mapping the real Wiimote to an emulated Wiimote).
"Passthrough a BT adapter" mode: any Wiimote that works with a real Wii also work with BT Passthrough, perfect Wiimote speaker audio, the BT adapter can't be used for anything else, does not allow mixing real and emulated Wiimotes, more finicky save state support, does not work with TAS features, nor NetPlay. Results greatly vary depending of the particular BT adapter you have, perfect compatibility is only guaranteed with a real Wii BT module modded to USB.
Avell A70 MOB: Core i7-11800H, GeForce RTX 3060, 32 GB DDR4-3200, Windows 11 (Insider Preview)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)
ASRock Z97M OC Formula: Pentium G3258, GeForce GT 440, 16 GB DDR3-1600, Windows 10 (22H2)