Perfomance difference with reference in kotlin

My question is, if there are any performance differences when I use references in kotlin versus the "normal" approach (without). Let's say, we want to submit a list to a ListAdapter, we can use two approaches.

Approach one

shoppingCartViewModel.productList.observe(viewLifecycleOwner) {
     it.let(shoppingCartAdapter::submitList)
}

Approach two

shoppingCartViewModel.productList.observe(viewLifecycleOwner) {
     shoppingCartAdapter.submitList(it)
}

What should be the preferred approach?