Just luck I guess. I got a really good price on my Dero from the dealer which had KTM ADV in very good condition and low mileage. The KTM was my dream bike for long time but couldn't afford it.
I think the GS12 is slight better for 2 up on road riding but the KTM is far better for off-road use. Also the KTM looks like a much more simple machine and I like that. After riding the KTM i'm not looking at anything else