Which Wifi Package hostapd vs wpad

To use a router as an access point, which WiFi package do you recommend and why? From what I can tell WPAD is a variant of hostapd that includes hostapd along with some other items. However, I can't seem to tell the differnce between the two.

However, its confusing has most routers seem to be including hostapd-common plus wpad-mini. Why not just include hostapd regular or wpad?

space constraints

wpad includes wpa_supplicant. If you have no need to act as a station, hostapd is fine.

I think wpad was made to save space. Hostapd and wpa-supplicant can be used separately.