I'm not qualified to distinguish between the two, but, maybe a discreption of behavior will help. Took more than twenty shots as this guy seemed to like the sound of my D800's shutter and kept coming in closer to me.
Cornell Lab's eBird folks tell me this is a Gray-Cheeked Thrush.
Nikon D800
,AF-S VR 70-200mm f2.8G TC-14E II 1.4x 1/250s f/4.0 at 405mm iso2200
DX Image Cropped L11x7" and ReSized for Internet Viewing
full exif