Are these two creation commands functionally identical?

I want to to know if these two are functionally equivalent. Is this:

Create table "users"
(
"userid" BigSerial NOT NULL,
"name" Varchar(20),
primary key ("userid")
) Without Oids;
Create table "sales"
(
"saleid" BigSerial NOT NULL,
"userid" Bigint NOT NULL,
"parent_saleid" Bigint NOT NULL,
primary key ("saleid")
) Without Oids;
Alter table "sales" add foreign key ("userid") references
"users" ("userid") on update restrict on delete restrict;
Alter table "sales" add foreign key ("parent_saleid") references
"sales" ("saleid") on update restrict on delete restrict;

Is the above functionally identical to:

Create table "users"
(
"userid" BigSerial NOT NULL,
"name" Varchar(20),
primary key ("userid")
) Without Oids;
Create table "sales"
(
"saleid" BigSerial NOT NULL,
"userid" bigint references users(userid),
"parent_saleid" bigint references sales(saleid),
primary key ("saleid")
) Without Oids;

Using postgreSQL 8.1 if it matters, thanks.