The AI 35/1.4 has a longer focus throw - 180° vs 105°
But it only has 7 aperture blades compared to 9 for the AIS (not rounded though)
unfortunately, not in the market for that at the moment. the wallet is still crying from last weekend's purchase (of the 35mm f/1.4 Ai-S)
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the Nikkor-O 35mm f/2 is very versatile. it is quickly replacing the 35mm f/2.8 lenses that I have for everyday carry. however, the f/2.8s are smaller and a lot more discreet
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the only reason for me to have the f/2 is to shoot at f/2.