So is that extra 0.5 stop a big deal?

Considering the Viltrox 25/35mm f/1.7 Air over the Viltrox 35mm f/1.4 because of faster smoother AF and cost.

Currently i have A sigma 18-55mm f/2.8

so jumping from f/2.8 -> f/1.7

is the extra .05 stop to f/1.4 that important and noticeable?

or should i go with viltrox air f/1.7 for indoor shooting