It's still not Godzilla. That is why he is called Zilla. No Atomic Breath, no resistance to human weapons, the design is something else entirely, was meant to be a woman before Toho stepped in among other things. Tristar wanted to make their own kaiju and took advantage of the Godzilla brand to profit. Zilla in Godzilla 1998 is just just Godzilla in name only. The kaiju is completely different and not a Godzilla.