In reply to Wiley Coyote2:
No single shoe works best and it changes with the conditions on the grit. A stiffer sole will help you more in warmer weather as it’s less likely to deform or roll off sharp holds such as edges or crystals when you apply pressure however it’s not going to help you on blank smears. A very tightly fitted soft shoe with a lace up system that locks your foot in helps with smears on both slabs and upside down land. My choices for bouldering are:
Scarpa Instinct VS for marginal footholds or warm days where you need a really stiff sole to pick at crystals.
La Sportive Genius for blobby smears, toe or heal hooks.