So many reasons that Equilab is superior to Pokerstove coming out in this thread.

Using Equilab, you can give Villain a pre-flop range, then you can put a flop in and open a window that allows you to interact with Villains range, and even allows you to auto-sort the range for hands that hit the board in a specific way. Then you just click a button that says "Take modified range to main window."