Yep Christ Lamfelle, the Thinline tech is proven, on paper it also should be good but maybe more on shock absorption than on spreading the pressure of seatbones (which sheepskin may be better at doing).
I would strongly recommend these saddles.
I've ridden my tall, sharp, opinionated Arabian gelding in a Christ Lammfelle saddle ever since I bought him, 10+ years ago.
Prior to that, I used it to back and ride away a feral pony that I bought from settled travelling people.
I'm fortunate in that I have long legs, quite good balance and 70+ years of equine experience.
One of the good things about the saddle is that it has a safety loop in front of the pommel. It makes a good grab handle, and I always keep my little finger under it when riding Mr. Spook Central!
I have the one from Kramer but just for very, very occasional use (I must have used it four times last year) for when we have days upon days of rain in summer (so not rugged) and then only in walk for max 30 mins. I.e. only in situations where I'd ride bareback and not as a saddle replacement, IYSWIM.
And absolutely not with the stirrups, which I understand can create massive pressure points.
For regular use, not I'd no go cheaper. Cheaper is a decent squishy numnah (ideally something like sheepskin that can slightly spread weight) and elasticated surcingle for the odd truly bareback ride. The Thinline may be slightly cheaper but I'd still recommend Christ Lamfelle out of preference.