It's not a matter of a better retailer or who has better products. Authorized resellers are free to offer an extended return policy. Apple's policy is 14 days, other resellers may choose a longer period. Apple products are all identical, there is no difference between the Apple products sold by an authorized reseller and Apple itself.
As to an advantage of where you buy, you can be sure that the employees of an Apple retail store are well-versed regarding Apple products. That has not always been the case with the employees of authorized resellers.
M1 Mac mini, macOS 13.4; Watch, series 7 GPS/cellular, watchOS 9.5.2; iPad Pro 2nd Gen, iPadOS 16.5; iPhone 12 Pro, iOS 16.5; TV 4th Gen, tvOS 16.5; HomePods, audioOS 16.5 and Airport Express w/ Airplay 2