125 or 600 Enduro

Hello. I intend to buy an LKRAD or a motorcycle next time. It should be an enduro, because I like to drive around in the woods and in the terrain. Now I don’t know if I’m getting an open DT 125R or a 600 4-stroke, because I don’t know much about the maintenance and so on. Because of wear parts, durability, purchase price and so on…. Maybe someone can help me. To what extent does it pay to get a 125er for an eventue price savings etc. I am grateful for any help and answer. MFG