Technical difference between Expert 250 Pro and Expert 220 Pro

[RvdH]

I share the question RvdH posed. Where's the beef? What justifies the price differential between the 220Pro and the 250Pro? The features seem the same (correct me, please, if I'm wrong). It can't just be the additional 30+30Watts and the pure copper bottom! For the price of the 250Pro I could get the 440Pro with loads more power. I'm using a 7-yr-old D200 and wonder about the way up (even beyond the upgrade D200>D220Pro).

Thanks for feedback!

Thanks. By the way: from my own experience I can say that upgrading from a 200 to a 220 Pro CI is a much bigger upgrade than from a 220 Pro CI to a 250 Pro CI. That is why I asked the question.