My EDC for months has been my Taurus PT709 Slim. It's been great, 600 flawless rounds, easy to carry, and VERY accurate.
I've been shopping for a 40 caliber and picked up the XD40sc yesterday. The similarities of shape, size, and feel of these two guns is amazing. I can use the same IWB holster. When you lay one over the other, the trigger guard shape at the front is the only variation, and the thickness.
I shoot the PT709 Slim more acurately, but I have 600 rounds through it versus 50 with the XD40. I'm sure with practice, it will be just as accurate. The similar comfortable feel is very appealing. I will carry both of these weapons depending on carry needs, attire, etc.
Here are a couple of comparative pics.