The problem with dual supply is that your opamps can then push -5V into the Arduino and fry it (I'm assuming -Vs = -5V?) - best not to do things this way if you can, you'll need to add protection resistors on the outputs (10k perhaps) to avoid burning out the Arduino inputs.
Its hard to compare the two circuits since one is a nice circuit diagram and the other a wiring diagram.
Using some low voltage rail-to-rail opamps would be better I reckon (certainly less complexity in power supply, but you might need to generate a 2.5V signal ground).