Yes, it is possible to have different wheels on these beasts..certainly more prevalent on the Danish, Canadian and Norwegian Leopard 1's but still present on 2's in some cases.
I found the wheels to be a nice improvement to the kit supplied wheels...I will go out on a limb and say over all of them. I used them to replace the PSM wheels on an AEV. The detailing on the PSM wheels were nice, being only on the exterior, but the wheels were undersized in diameter.
The demarcation between the rim and the rubber on the Leopard Club wheels was better, the bolt details are present on the inside (which does get seen once built) and the correct diameter....at least form what I found.
Only thing I didn't like about the Hobby Boss was the bolt flanges are triangular in nature where the Leopard Club Wheels are rounded. But that is just my opinion!