I am by far an expert in the .17 caliber area, but you basically have a .17 Remington and .17 Hornet for production rifles. Some do chamber the .17 fireball perhaps, but any of the wild cats or commercial lies somewhere between the two (Remington and Hornet).
Now the .17/204 sounds a lot like the .17 Remington but actually probably has more velocity since the .204 (patent case) is based off the .222 magnum whereas the .17 Remington is based off the plain ol' .222.
I would say the fireball is smack dab in the middle of the Remington and the Hornet.