ARC Ref 5se inferior to LS28?


This is what a big dealer told me the other day. Dealer speak or right on the money? Would very much like to hear opinions of the many knowledgeable ARC users on Audiogon. Thanks

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Any new news on ARC preamps- Ls28 Ls27 Ref6  Ref5se- Moving in and out of units - Bad move  Good move?? 
If one can’t trust an ARC dealer’s word for an ARC product recommendation, then who can one trust?
I recently auditioned the LS28 and Ref 5SE at a dealer. All else (Wilson Sasha DAW, kimber cables, arc ref250 amps, Linn akurate source, room position) remaining unchanged - the ref5SE offered a marginal improvement in presence, weight and sound stage over the Ls28. Tonality was virtually indistinguishable. Slightly better bass with 5SE. I cant numerically quantify the improvement - but i'd say it falls under the diminishing returns category. If it takes a spectacular system to reveal the marginal difference - i cant imaging how in an average users system the 5SE would outshine the LS28. That was my objective take - YMMV
very reasoned opinion. need more like this. so much money is paid for a “difference” sometimes its just that. a difference. might be better..might not