I finally realised what it is about him that seems off! Looking at the G1 and the grey on the body always seemed a more dark tan kind of colour, this is a full on slate grey. Of course the mouth not being yellow is a bug too but that was pretty obvious, and my FP Chromedome already has the wrong colours on his face so what's one more to the club? I might still get this guy, but I've other priorities for now.
assembling a Neo-G1/TF:TM cast. Please PM if you have (or know of) the following at a reasonable price: Classics or Henkei Prowl, Astrotrain, Ramjet, Skywarp, Sunstreaker, Sideswipe, Blurr, Perceptor, GDO Wheelie and Springer, or 3rd Party Motobot Arcee, FP Springer, iGear Ratchet and Ironhide, City Commander (and/or Ultra Magnus), Starscream (deluxe) Coronation add-on, or Spike and Daniel in their Exo-Suits.