Today I found a difference in the three Tigers. Two are so close to identical that the white on the tips of the front paws are too closely matched to distinguish.
The white on the hind legs is a bit better. One has white higher up the whole back leg on one side, the other is nearly a quarter of an inch lower. The darker tiger is high on one side and low on the other.
Whoever sired them was certainly CONSISTENT.
This is from the photo shoot when they were just a few hours old.
Maybe they will end up named Tiger White Leg, Tiger Whiter Leg, and Tiger Whitest Leg, who knows?