Bryston's BP-26 vs 17 cubed

I’m curious if anyone has done a serious comparison of Bryston’s BP-26 and the 17 cubed? I have been demoing the 17 cubed for approx. 40 hours now. Previous preamp was Classe’ Sigma SSP. My other gear consists of Joseph Audio Pearl 20/20, Classe’ CAM-600, PS Audio Memory player and Directstream Senior. I like the 17 and will be demoing the 26 towards the end of the month. The 17 has a nice warmth to it without sounding too syrupy. From what I have gathered the 26 will have more punch towards the base mid-range, and perhaps more detail? I have narrowed it down to either of these two units, not interested in other preamp suggestions. If anyone can shed some insight into this it will be greatly appreciated.