Jimillian, There is perhaps a slight difference between the two sets of pictures, but I notice that you did not use the same settings to compare. With the K-70 you use F8 and the K-3 I see F4.5. That slight difference may be the result of the different settings you used, especially when the focus range is close. But I also note that the leaves in the fourth picture at the bottom are sharper than those of the second picture, it is a minimal difference, but it is there. I do not think you can honestly compare them and say the K-70 does a better job. You did use different metering modes and exposure modes as well. I tried the KP and K-3II and with the same settings they gave exactly the same results, (be it that the KP is a bit brighter but with the same colour setting: natural), sharpness and detail of both are exactly the same. My advice: try it again (if necessary) and use for both camera's exactly the same settings. So the same ISO, F and shutter values, metering modes and so on. You can also use this method for calibration:
https://testcams.com/blog/2015/09/22/dottune-autofocus-fine-tuning-in-under-5-minutes/. It actually works very well. And avoid close range, because it makes it so difficult to get it right, just a mere whisp of wind gets you an un-sharp picture, you might not even have noticed it. Or use a static object to avoid movement by wind of flowers and branches with leaves.