It's a tough one... I'd be drawn toward the 4001 but RIC aren't exactly consistent, both 4001s and 4003s have varied wildly from year to year, particularly in the shape of the neck. QC isn't always the best either so it really is try before you buy if you can.
It's odd that a 70s Rick is priced virtually the same as a much later '03, it's a lot more collectible.