What he said. I have a HW100 Mk 1 in .22 & the accuracy is absolutely spot on. I've taken down targets with 1in kill zones at 45 yards standing no problem. And that's just with me using it, in the right hands it would probably do much better at the same distance & beyond.
In my experience, it's all down to personal preference. The SuperTen is a very accurate rifle but I just don't get on with them. My HW100 on the other hand is everything I could want from a rifle albeit a little on the heavy side but that's just my humble opinion.