According to this known data miner (translate the tweet)
https://twitter.com/KLaboratories/status/1686196403888869376
The Kunai will inspect once normally and then start spinning so it does have a new animation compared to the valorant go knife
the recent "leaks" conveniently stop just after inspecting once
https://twitter.com/ValorLeaks/status/1686420882032390144
I also bet that ulting with jett will replace all her regular kunai with the champion kunai like how equipping the oni katana changes yoru's ult
never doubt riot they can't be that stupid right?