The UAD and Native versions of our plugins use the same code base and therefore their signal processing is indeed the same.

One of the reasons to use the UAD versions is to have zero latency monitoring, which means you can hear the effect of the plugin in your headphone monitors in real time when you are playing. Without DSP hardware (like the UA Apollo) there might be a very slight delay in your headphone monitors, although this depends on your computer's processing power.