Both perform high quality work. Soundsmith usually does not retip. They replace the stock cantilever and stylus with a new assembly including a ruby cantilever.
Based on the price from Andy I think he is quoting you a price for a retip, that is only the stylus is being replaced, and the stock cantilever is remaining.
Retipping (stylus replacement) with the same stylus configuration will give you the stock sound when returned. The replacement of the cantilever as well with a different material will give a different sound than stock, which you may prefer, or not, to the stock sound.
Based on the price from Andy I think he is quoting you a price for a retip, that is only the stylus is being replaced, and the stock cantilever is remaining.
Retipping (stylus replacement) with the same stylus configuration will give you the stock sound when returned. The replacement of the cantilever as well with a different material will give a different sound than stock, which you may prefer, or not, to the stock sound.