Yes, but the Firefly has a turret, and the ability to take SOME kind of a hit, even if not much, which is the point. The ONLY way the nashorn is similar to the firefly is that they both mount powerfull cannon, and are easier to destroy than most other tanks.
An M8 will wail the stuffing out of a Nashorn beause:
1) its a small fast target, which makes it hard to hit
2) the Nashorn can't take any kind of hit
3) it lacks a turret, and so has to rotate the hull to keep the M8 in the line of fire
And the Nashorn entered service in early 1943 as the Hornisse, a slightly modified version entered production in the second half of 1943, and the vehicle was simply renamed Nashorn by hitler in 1944. If we get this, it will be in midwar, probably for a very high perk price.
But the only reason it would be perked is because its gun is more than good enough to compensate for all of its weaknesses. And in late war, it doesn't have the firepower advantage exclusivly to itself. If it only mounted the Pak 42 L'70, I bet it wouldn't even be perked more than the M18.
