Updates are just that the 997 has 450 and 800 where the 987 does not have 800. It is also a lil bigger screen which means more clearer pics I have the 997 now and had the 987 and will be upgrading to the 1197 the daddy of them all. You can see things with both the 997 and 987 but I feel that the 997 shows objects much better than the 987