In May of 2023, I had Cap send me the SP12s and also model 34 speaker cables in 10" length. At the time there was no mention of the SP14s. I tried both in my system and found the model 34 as the clear winner. I think the main difference was the added clarity of finer details in the music.
I have the Simaudio Moon 600i integrated amplifier, and Focal L&R Utopia Be loudspeakers.