Đây thưa các cụ
Cái này gọi là TRIM LEVEL
http://en.wikipedia.org/wiki/Car_model#Trim_levels
A model may be offered in varying "trim levels", which usually affect little more than upholstery (cloth or leather, for example) and standard equipment. It is common for any specific car model to carry additional badges or letterings to announce its trim level. For example, the Toyota Camry's trim levels: Camry CE (Classic Edition), Camry LE (Luxury Edition), and Camry XLE (Extra Luxury Edition). Some manufacturers prefer names rather than initials for trim levels; the Renault Scénic range includes entry-level trim badged Renault Scénic Authentique, the next model up badged Renault Scénic Expression, then Renault Scénic Dynamique and finally the luxury Renault Scénic Privilège.
The highest trim level is sometimes seen as slightly removed from the rest of the range. Ford traditionally have a Ghia luxury model above those which simply use initials, whilst Rover used the name of a former coachbuilder, Vanden Plas. There may also be a high-performance version such as a GT.
