It seems the loss on a Kioti machine is almost always more than the other guys.
It seems you're referring to 'loss' as being the difference between the engine HP and PTO? Kioti specs are what they are per model and HST or gear trans.
Regardless of what others report regarding use of high range, IMHO it depends on what one is trying to scoop and lift/transport. Sand, dirt, gravel, etc., on level ground, wet or dry material or road surface, etc.
Tractor tires loaded or not, tractor in 4wd or not, rear ballast in place or not - etc., etc.
Some report never or hardly any use of high range. This, for me at least, is most applicable to the DK series Kiotis, after having put 1050+ hours on two DKs since 2009. First a DK-35se/hst, and current DK-40/se/hst.
I have loaded rears and usually either my hoe or BB on too.
IF you're going to be using PTO driven implements exclusively, or primarily, maybe PTO HP vs. engine HP will be a deciding factor, but I doubt that will be all that relevant for most DK sized tractor owners.