If you treat it as the 5001 as they are rightly meant to be, the tell isn't really obvious at all. Even for a 5007 the only exterior differences are the curved spring bars and some prints.
I am not an expert and frankly, I am now trying to find out how many versions of 5001 are there in the gen world. But I can only find the following 5001 versions on the net as of now:
1) 500113: rose gold with white dial and golden numerals
2) 500107: SS with white dial and blue numerals
3) 500109: SS with black dial and silver numerals
4) 500106: white gold with black dial and silver numerals
5) 500114: SS with white dial and golden numerals
So, the above combinations on the latest reps' back case appearances (which is actually more similar to 5001 versions) can then be passed off well as a 5001 and not a 5007.
Of course, there could be more if we can find out what are 500102, 500103, and etc.....