Hello George and Claude,
I too asked myself that question, also earlier than when Tamiya's Renault UE came out.
The AMR tracks indeed look wider than the UE tracks, but I think the Universal Carrier tracks [Not the Tamiya ones!] are pretty close [although not exactly similar] to what the AMR uses.
I plan to use a MK set on my old NKC kit one day, or a similar detailed set of UC tracks.