I had used all of the different Beef tenderloin grades: Kobe, Prime, Choice, Select and No-Roll and definitely you can SEE, SMELL and TASTE the difference.
If you are in a budget, you can use a No-Roll using a marinade and with a strong sauce to cover all the unpleasent flavors and make your customers happy.
With a Kobe or Prime, you just need Kosher salt and pepper to enjoy a fantastic steak, any sauce can be used to combine with the steak.
Trust me, the grades are there for a reason, you get what you pay for.
I don't eat much beef because of the prices, but definitely a better grade is a better product.