Scarpa Booster S

The Booster S is best for really steep climbs. As the angle gets less steep on walls with lots of edging, the hyper sensitivity of the Booster S becomes more of a negative. In those situations, my feet would get really tired, nearly to the point of cramping, by the time I was done with a pitch. If you climb at areas with lots of edging, you might want to stick with the Boostic, or even consider something more robust like the Instinct lace up.

In terms of fit, I found the Booster S to be slightly lower volume than the Boostic, but only in the toe box. When I get my next pair, I might try going up a half size to see if that provides more room for my toes. After all, we now know that wearing shoes that are too tight is not the way to go.