Audio Research LS 26 vs LS 28


Hello, I am currently enjoying my ARC LS 26 and would like to hear from people who have had one and moved up to or experienced the new LS 28 .  I know it's a newer design and looks great IMO.  But can anyone weigh in on the sonic improvements they experienced when comparing the old vs the new model.
Thank you
vdosc
Man you ARC guys are loyal! If I was gonna spend that much dough on a pre, I'd also look at the Atma-Sphere MP-1, EAR-Yoshino 912, etc. Why limit yourself to ARC?
Yeah, same reason some people are loyal to Mercedes. I did not ask what's the best car ever, just describe the improvements from a 2009 Mercedes E class to a 2019 Mercedes E class.  Not asking the question is a 1979 Ferrari better ...