Please Springfield fans explain to me where is the $150 - $200 hiding in the XDs over the Shield?

I have handled an XDs and studied the build and I honestly can't find the extra $150 - $200 in the build. I'll give Springfield maybe $50 extra for the case and accessories (replacement grips, molded holster, fiber optic sight) but for the life of me I can't see $150 - $200 over the Shield.


Russ