Salt Lake City or Portland: which is greener?

Here are two screenshots of satellite images from Google Maps; the resolution on both images is the same. Click on each to see the large view and decide which city has a greater amount of vegetation or green space:





The honest answer is that Salt Lake City is far greener...both images are from summer, because Forest Park in Portland shows as green. Forest Park has many, many deciduous trees...if the image were from fall the color would be significantly different.