The Nikon 35ti will survive a fall. Will the Olympus take one?
Also, the Nikon camera has a titanium body and a panorama mode, in a nice, relatively fast lens, with a body that works like an SLR. If the Oly allows you to compensate the exposure when needed, and has a nice quiet shutter along with a matrix meter... Then, sell the Nikon and keep the other one.
Take care!