I am also deciding between the two,
Well, Pixel 8 costs 900$ in my country, while Pixel 7 costs less than 500$...
I am not sure if that security feature is worth 400$.
One might say that pixel 8 has a lot longer longer support (7 years),
but we all know how most of the google promises end up. (And I know this one will follow that pattern too)
What about Pixel 7a? Does it have any security advantages over Pixel 7?