maybe neither
spreading 1-5 and beyond in SD invites scrutiny, which invites being shown the door or worse.
A good counting system can beat a SD game with no spread at all, so a good counting system with a small spread can do pretty well.
I personally shoot for 1-4 in SD, and can, on occasion get away with more depending on what is going on at the table, the location (small bets at tables used to big bets are often overlooked, while big bets at tables used to seeing small tables attract the pit, the eye, and others...
SD is a "touchy/feely" type game. You have to be aware of what is going on throughout the pit, to see if you are attracting attention, and you often have to go to lengths to disguise your spread...