What is more secure: Remove all data and settings OR set to BFU (iPhone)?

Lets think of a situation in which you know, you got like 10sec left before your iPhone (i use face id and a very long password) is going to be seized. What would be the better choice in terms of making the data as inaccessible/inextractable as possible (loss of data isnt a factor for this question): „remove all data and settings“ or setting it in the BFU state, so basically just turning it off?

data iphone privacy settings