Upload & Sell: On
I had the Siggy 1.4 and while the bokeh is better than all but CZ, or Leica, it was sketchy for AF consistency. I sold it after working hard to adjust to it.
Got the 1.4g and while the AF accuracy was much better, it too was less than consistent. I still have one of these lenses, but when I have reached for a fixed 50 lately, its the 1.8g I go for. Sharper and faster than the 1.4 at its widest ap (unfair comp I know), but my biggest reason is that it is consistently on target.
So, as with most things photographic, its a choice based on compromises.