The open reserve changes the game entirely
In standard Canfield you discover the reserve one card at a time. In Superior Canfield you see all 13 at once. This lets you identify which tableau columns to build so that reserve cards flow freely — a skill that separates good players from great ones.
Common mistake
Even with unlimited redeals, players often cycle the stock repeatedly without first maximizing reserve plays. Each reserve card placed on the foundation or tableau is a permanent gain; stock cycling just reorders the same waste pile.