Everybody needs a TS10.
If you want low enough lumens with high enough CRI for wound examinations, it's a nice addition to your collection. It can bet lower than your M150, or it can get obnoxiously high, and it ha a smooth ramp in between the two to get any level in between. Ramping UI's rawk. As one who both works optometry and has been sent into medical distress by medical personnel using shit lights for pupil exams, I can attest to the value of a TS10's ramping UI. If you ever encounter a patient who is on the spectrum, epileptic, or has other medical issues triggered by photosensitivity, you'll find the TS10 potentially better than the Weltool M6 I recommended to my boss, an OD who knows more about eyes (37 years in practice) than about flashlights. He doesn't do SAR though, so he doesn't need twice the lumens an M150 is capable of, but it's also the only light my CRI-baby arse would consider a rival to the Nichia 519a and 219b. If you think the Nichia M150 is nice, you'll also like the TS10.
The only light I have that can compete with it for beauty or CRI/R9 is an Emisar D2 with a 4500k Nichia 219b. And that light has a UV channel for other uses. Not as powerful, but since I use UV as part of my job, a bit more useful. And still plenty powerful for close work; simply not good for throw or sheer power the way my TS10 is.