Yes, the roan horse has a similar appearance, but is more like the D'Argent rabbits than the Silver and Silver Fox. The appearance of the two different types of silvering is very unique. I suspect there are either at least 2different silvering genes on the same loci or simply a quantitative effect bred into D'Argents that gives them so much more silvering that gives their coats a creamy appearance like a roan horse.Attached is a photo of a real Silver Fox. The Silver Fox rabbit has an identical coat (I got to pet someone's real Silver Fox once and also own a Silver Fox rabbit). The silvering on the Silver rabbits is similar to the Silver Fox rabbits, but the texture of the coat is very different. The Silver Fox rabbit is the only breed with a "standing" coat that stays upright in position when stroked from front to back -- just like the real Silver Fox"fox". The Silver's coat returns very rapidly to position.
Sadly, the Silver and the Silver Fox rabbits are rather rare, and it's difficult to find good photos of them on the internet.