I personally would be gambling on 2-3 eyes in the fall if they arrive in October here in Toronto as they would be probably similar in size in the fall 2024, but this assumption would be based on many "ifs" for you. Is the price the same? When is delivery in the fall and by whom? Some of the imported wholesale roots are often late and in your zone it means either planting in pots or preparing the hole early, so the whole idea of planting 1 year early and let them be established before winter may not be valid.