Most spruce cones have papery thin scales. Many people think that spruces, Douglas-firs, and the true firs look alike. In a general way they do, but look closer. Feel the needles. Spruces have stiff, prickly needles, while Douglas-firs and true firs have soft, flexible needles.
Location is probably the best clue to their identity.
Grows only near sea level. Grows only at high elevations. Needles are typically square in cross section, and range from being very sharp to blunt. Needles are typically square in cross section and are blunt on their ends.