Here are some plots showing SRC performance, for Cubase and another DAW, from the link at the top of this post:

Cubase's transition filter.

Ableton Live's transition filter.

On the Sweep plots below the curves are said to represent aliasing of the ultrasonic signal (the kind you'd get with close-miked brass, high strings, cymbals, etc. recorded at high levels) back into the audible band. Also, in terms of the background color, "black is good", non-black said to represent quantization noise:

Cubase 4,5,6,7 and 8 Sweep plot.

Ableton Live's sweep plot.

To me, the question remains: How do we know if these graphically obvious differences from ideal, and between different DAWs, are audible?I'm guessing when not recording sources with a lot of high frequency content at high levels, it should be just fine.