I've had all three.
In .177 calibre .
The 410 was a carbine , with a left handed walnut stock ,nice and light to carry around and deadly accurate.
The HW100kt is a carbine thumbhole with a fantastic side lever cocking mechanism. It's a little heavier than the 410 and is again unbelievably accurate.
The Huntsman , again I had it with a left handed stock and action , reasonably light and the accuracy , well the less said about that the better !
My HW100KT is still my go to rifle , although currently it's a tough choice between it and my new Kral Puncher NP-02 . A bargain price rifle that although may not be quite as refined as the others , shoots equally as well and is more than capable of both targets and hunting .