My guess is bad reagent if the K-1000 is always reading about 7.5 (orange-red). I have seen this happen before. How old is the reagent for each kit? The other possiblility is contaminatin (pissilbly from the TA) in the large comparator tub in the KJ-2006. Make sure that the tube is clean and rinsed out with your sample water a few times before you test.)
They should be testing exactly the same ( I use both all the time). If they are not it is most likely bad reagent or a contaminated or dirty comparator. Easiest way to check it to get new reagetns for both, they are not expensive.