Probably listened to each for half hour. Here are my notes that I took at time on my phone:
Auditioned Rega Elex-R vs. Bel Canto C5i integrated amps. Magnepan LRS speakers (no sub) with Rega Apollo CD player. Small room
Liked Rega better. Close. Rega better bass, more full bodied, more layers, grittier. Bel Canto more clarity, maybe more revealing, maybe little wider soundstage. Salesman thought BC better
Listened for about half hour each, Buddy Guy blues.