It's a little confusing... the underlying kit in the photo seems to be a mix of different things, because 6660 has no Zimmerit as you say.
But it's the Voyager parts that matter.
Most of it looks good. The mantlet is for an ordinary Tiger, so it would not be used with the Command Tiger that the kit builds into. I guess it's for people doing a conversion.
The roadwheels with missing tyres are a nice option.
The set seems to provide a resin hub to show when an roadwheel from the outermost row is missing (see the 7th axle on the left side of the sample kit). This is unnecessary because Kit 6660 includes the full set of 8 such hubs, along with 8 photoetch locking rings for them. (we found a photo of a Mid Tiger in service missing all its outermost wheels.)
The set also seems to provide a hub for a missing wheel on the second row (see the 6th axle). And this part is just wrong. They've copied the removable hub from the odd-numbered axles, but in reality, the hub for the even-numbered axles was not the same at all.
David