Originally posted by johnmflores 5r doesn't have sensor-basedimage stabilization AFAIK. K-01 has all day battery. 5r doesn't have built-in flash and flash port is non-standard. K-01 has built in flash and standard hot shoe.
The 5r is probably a fine camera but I don't think it's fair to call the K-01 uncompetitive.
I know, super late reply, but...
Personally, I find constantly having to fiddle with the IS lens settings on a manual lens to be enough of an annoyance to just turn it off, but okay, I'll give you that one. Then again, the NEX does far better as the ISO goes up.
I usually get all day out of one battery for my NEX cameras, but if you are that worried about it, carry a spare, which will cost less than $10. You will still be carrying less bulk and weight than a K-01 by itself.
You are correct about the built in flash. I guess I tend to think very little of built in flashes. As far as your dig on the flash port, just buy a $5 adapter and leave it on the camera permanently. problem solved.
Of course I didn't cover the fact that if you don't use flash you could get an articulating EVF, and the 5R comes with an articulating screen, to which you can attach a screen hood. you can't have those things on a K-01 at any price. So yeah, the K-01 has a built in flash, and a microphone in port. Other than those 2 things the 5R wins, period.