Comparison of G1 and 2010 Reissue Predaking. This isn't meant to show all the differences, but just a few examples. I really don't have time to do detailed photographs. Apologies for my lack of photographic skills, the layer of dust on my G1 Predaking, and it's terrible stickers.

Note the differences in the stickers. Not all have been changed, but many have. The biggest changes are the yellow vs. gold plastic and all the orange and red plastic has a slightly metallic sheen to it as opposed to the G1 whose colors are lighter with more of a matte finish. The new one has a new sticker sheet with red eye stickers for all animals and robots. Accept for the Predaking head which is still black without the stickers, the eyes were painted gold. The swords are more gold while the original is more bronze.