Depends on what you intend to feed with it, and what your plans are. Nobody here can tell you because we cant see your cattle nor do we know what you intend to do with them. Just buy what fits your plan for your cattle.
Don't know what cattle you're feeding and what you are looking to do with them. You might try adding some specifics and putting the post over in the feedlot board. There are folks there who have a great deal of experience. I don't.
I will be feeding heifers and steers from 4-9 months of age. I'll market them at the stockyard in the special preconditioned calf sales. The only commodity feeds that are close are cottonseed and citrus pulp, but storage would be a problem.
Do you have a local feed mill? They could tell you what other customers in your area are using. In our area it is a 14 percent creep that the feed mill mixes up.
When I started creep feeding a few years ago I used a 16% calf grower . but the last couple years I I've been using the same feed I grind for my steers which should be 12-13% , and it seems to work fine , I used to be against creep feeding but I think I takes some stress off the cows when grass gets short.