they have a different sound signature, but both should work as your speakers are 91db well efficient
Rega Brio 2017: warm, lively, authoritative
Rega Elex-R: lean, lively, bigger sound stage
other amps to consider, but above 1L
Roksan k3: big bold sound stage, good layering through mid range
exposure 2010: fast attacking, agile, timing and rhythm
Naim 5si, etc
check what kind of singnature you like and what suits your speakers