I'm in the needs of a new mouse, and these two Logitech mice peaked my interests. I saw they were the same price, but which one is better? I play TF2 competatively and need mice accuracy over anything. I do not need programmable buttons, and I need one that will not strain my hand over time. I also need a mouse that can handle spam-clicking for sticky spam. I am open to any other mice for $40 if any of you have any other recommendations. It seems that the 300s has more features than the 100s, but I don't know if the actual core mouse product is better than the 100s. Please tell me what you think!