I will arrive guangzhou 930 night how or best way to go to xinjuyuan hotel. thanks

From the airport, you are suggested to take the shuttle bus line 10 to Pazhou Segmen Hotel. Then take a taxi to the hotel at a cost of CNY10.

Thanks is it faster by bus than subway train?

If you take the subway line 3 to Datang Station, the duration will be about 50 mins. And you need to take another taxi to the hotel at a cost of CNY10, and the duration is about 5 mins. So in total, you may need about 70 mins, including the time to hail a taxi and transit time.
If you take the bus, the duration is about 1 hour (need more time when coming across traffic jam), and you need to hail another taxi to reach. So generally speaking, taking the subway is a bit faster than bus.