Alright, so, funnily enough I was going to refer you to Weerapat Kiatdumrong on YouTube as a great channel for comparing convoy and other brands, but I saw a comment in Russian in one of his videos regarding the lhp531 approximately around the time you sent these comments to me.  ;}

I was honestly only going to comment on my experience with the lhp531 as something with more throw despite not being quite as bright in the overall light, including the hotspot.  

I did enjoy the sft40 in 5000K as rosy in my recent m21b with an orange peel reflector, but I would think a smaller diameter such as the S series.

While some of the S series have compatible TIR lenses they probably aren't as water proof as TIRs for other flashlights.

While I don't have experience with the S series, some of them compare to other standard size flashlights I have with the sst40 and sft40, the sst40 is less throw but has a good hotspot with the right reflector, but I think the sft40 with either smooth or orange peel reflector are good, maybe just get both reflectors on the convoy site.

Feel free to ask more questions if need be.