Are the steaks on offer true Japanese Wagyu or are they American Wagyu? The latter is actually a misnomer because true Kobe/Wagyu can only come from Japan. American Wagyu is a cross between Wagyu cattle and either Longhorn or Black Angus so it is not pure. Additionally, very few US breeders go through the elaborate process of feeding the steer beer and massaging it with Sake that further increases marbling.
American Wagyu does not have anywhere near the same marbling as Japanese so I would recoomend the rib eye with out question for domestic. I have eaten an alarming amount of true Japanese Wagyu and I generally prefer the rib eye also although its superiority over a strip, in terms of marbling is less pronounced than with other steer.