I assume you are using a P/C.... Because the PC is not as strong as a rotary, you need to compensate for less machine power with more product and pad power. I would buy both pads, because they are like tools in a tool box.
I was going to buy a makita but lowes stopped stocking makita so i bought the Hitachi. In reality, the Hitachi and the Makita are both the same design. Same handle, same size, same speeds, and same slow start.
One of each pad, including shipping, costs about 2x of what the older pads (one of each) would cost. Are they really worth it if you consider that, and considering that neither of my 2 cars are scratched (No RIDS, maybe holograms at most with some very fine random spiderwebs)?