Audio Research LS2 vs Audio Research SP16L

Hallo there from Italy! A "simple" question for an important answer. At the moment I own a pair of Vienna Acoustics Grand Mozart Grand, an Audio Research Classic 30 amplifier and an Audio Research LS2 pre. While I'm not even thinking of selling the Vienna and the Classic 30, I may have the opportunity to buy an AR SP16L preamplifier. Without wasting any euro, is the swap with LS2 worth? I listen almost only to classical music and, in the past, I used to enjoy my Italian Mastersound 20+20 class A integrated sound. Thanks for your valuable help. Cheers. Maurizio. Italy