1, Xiao Ai is a mobile phone voice assistant. The response time of Xiao Ai is 1 sec. Xiaobu is an AI voice assistant app, and Xiaobu's response is 3 seconds later. Xiao Ai needs a shorter response time than Bud said.

2. Xiao Ai is the voice assistant of oppo mobile phone, which can be used without downloading. Xiaobu is the software that Shanghai He Fei Digital Technology Co., Ltd. needs to download and use. Xiao Ai is more convenient to use than Xiao Bu.