I currently have 2 pieces.

#1373, Malaysian, 2 light grey, 3 sand or light tan, & 2-3 (changes as it wraps around) medium brown

#906, Canadian, 3 medium grey, 1 sand, & 3-4 medium brown

The other variations between them I see is that the rocks on the Canadian are the medium grey like the bricks, while the Mayaysian is the sandy color like the middle row of bricks. Also the portholes, or windows, and the lantern room panes are different. The Malaysian is lighter than the Canadian & maybe the both are the same as the rocks.