Is It Better To Stack 2 Stereo Delays or 1 Mono & 1 Stereo?

Is it better to have 1 mono delay and 1 stereo delay when stacking delays, or just to go all in with 2 stereo delays?

In this video I compare both options on my pedalboard with sound clips so you can hear the difference. 

You can decide for yourself what is best by listening to the video above!