People look at a half used bar of soap lying in a shared bathroom and think "Some other dirty person has rubbed that in their private parts. No way I'm touching that!!!".
Soap, unless stored in a well designed soap dish, also always has a partially dissolved slimey bit that's pretty icky.
Never heard of soap bars being considered dirty ever. That slime is just because the soap has been sitting in puddle of water in a soap-dish.
If the soap bar has "stuff" on it, you just rinse it and rub that stuff off in a second.
I'm not sure how well each of them will work, but I bought a few different bars of SheaMoisture soap and am mega pleased that the first one (https://www.sheamoisture.com/100-virgin-coconut-oil-daily-hy...) has yet to produce any soap slime. It's the only soap I can recall using that hasn't.
FWIW, I keep it vertical (sitting on the smaller end surface) on a flat shelf in the shower and not in a dish.
I have a good impression of its economics, too. I mostly just use it on my armpits and find a single up-down swipe of the end of the bar per pit produces enough lather to clean each pit and anywhere else the sun doesn't shine. I've been using it for like two months and it still looks like a full bar of soap.
For the past couple years I have been looking to cull/replace shower gels/shampoos with products that have fewer dicey ingredients per the EWG database, and none of the others can compare with how well this one controls BO (both absolutely, and in terms of the amount of time/effort I had to put into washing them with something like Dr. Bronner's to even be able to put up with my own smell.)