Why doesn't the UserState account need an additional space ANCHOR_DESCRIMINATOR_SIZE in example close-account

[SpriteOvO]

program-examples/basics/close-account/anchor/programs/close-account/src/instructions/create_user.rs

Lines 9 to 19 in 16068f8

	#[account(
	init,
	payer = user,
	space = UserState::INIT_SPACE,
	seeds = [
	b"USER",
	user.key().as_ref(),
	],
	bump
	)]
	pub user_account: Account<'info, UserState>,

Why doesn't this account space need an additional ANCHOR_DESCRIMINATOR_SIZE (8) but the below does?

program-examples/basics/account-data/anchor/programs/anchor-program-example/src/instructions/create.rs

Lines 9 to 14 in 16068f8

	#[account(
	init,
	payer = payer,
	space = ANCHOR_DESCRIMINATOR_SIZE + AddressInfo::INIT_SPACE,
	)]
	address_info: Account<'info, AddressInfo>,