What is the difference between bluetooth verison and wifi verison?

1.The Bluetooth version can be used directly with mobile phone Bluetooth, but does not support Alexa or Google directly .(Notice: If you have bluetooth gateway ,you can pair tuya bluetooth led bulb with Gateway Hub, then Tuya Bluetooth bulb can be compatible with Amazon Alexa and Google Assistant.)
2.The wifi version can support 2.4ghz wifi and supports Alexa voice control directly.

Specification:
TYPE:Tuya Bluetooth Bulb
Light color: RGB + Warm white + White (2700K-6500K)
Connection: Bluetooth
Volatge : AC 85-265V
Voice Control: Need tuya bluetooth hub

TYPE :Tuya Wifi Bulb
Light color: RGB + Warm white + White (2700K-6500K)
Connection:2.4ghz wifi
Volatge : AC 85-265V
Voice Control:Support Alexa ,Google Assisatant