Aside from the obvious color change there are some key differences from the first actuator arrangement (left) and the one I settled with (right). The original arrangement has two shoulder actuators in the center of the robot and one actuator at each front of the robot (there isn't really a front and a back because it's symmetrical), this allows to move the hip actuators closer together and thus move the feet closer, making a more slim robot. However, this comes with some complications and disadvantages: having two motors on the outside of the robot exposes them to harm easier, the actuators on both fronts on the robot adds mass further from the center of mass, the space between the hip actuators, which should serve as a place to store the batteries and power distribution, is small.
The new arrangement is much closer to the ODRI Solo 12 design. If you're not familiar with ODRI's work and the Solo 12 robot I encourage you check them out. This arrangement keeps the fully symmetrical design and has a few advantages: most of the mass near the center of mass which is ideal, there's more space between the hip actuators for storage, there are no motors exposed, leaves both fronts of the robot open in case I ever decide to try vision and automated navigation.