Don't know about the Hilton, but I just stayed twice at the 4pts in July. I like to keep the windows open instead of using the a/c. If you're a light sleeper, it can be quite noisy with the windows open when the airplanes land and takeoff from YVR airport if you get the odd numbered rooms facing north toward Vancouver. The airplane noise is more muffled in the even numbered rooms facing the Lansdowne Shopping Centre, but then you get more traffic noise from Alderbridge Way just outside the windows. If you keep the windows closed at all times, there shouldn't be any noise problems from the traffic and airplanes. The Hilton is a few blocks further south away from the airport, so the airplane noise should be less there.
The 4pts provides free one hour/day Internet use in their business center in the lobby. Rooms were very clean and furnishings pretty new.
Assuming you're Chinese from your username, there are tons of Chinese restaurants in the Richmond area within walking distances from both hotels. If you have a car, there's no limit. Great food and prices too because of the exchange rate.
Enjoy your stay in Richmond!