DGA’s range runs the usual three tiers. SP is the clear, most durable blend; ProLine is the grippy premium; D-Line, which DGA also writes as DL, is the tacky baseline the putters come in.
Two entries need saying out loud. Signature Line is a real rubbery soft plastic, not a stamp series. And RDGA is a lightweight blend for 150-gram discs, not a recycled sub-brand, despite the name.