Needle Replacement KD & SM

So I ordered the SM needles to put in my SU's thinking I had the stock needles from the previous owner. When I removed the old needle, I noticed they had a KD stamped on them. Come to find out, the KD's are very similar to the SM's only a little richer at the top end. Did a quick test drive and really could not tell a big difference. I guess that makes sense. So, I am running the SM's. Will monitor and see how the mileage goes since this is my daily driver. Just thought I'd share the info as I had not heard of the KD's before.