This really comes down to personal preference and will depend on the type of commercial space you have and what you’re trying to protect. When you have commercial door locks that are keyed differently, different keys open each door. If locks are keyed the same, every lock is opened with the same. If you want to have your door keyed the same, it’s important to keep in mind that while it is more convenient, it provides the same level of security to every access point. If the lock is easy to pick the first time, it will get easier each time they break in another part of the store or building.