The Classic series of old and the recent models are totally different in my opinion. So much so that instead of buying any of the recent versions of the 1/2 I waited patiently to buy a pair of the older 1/2e that I had owned several years previously as well. I find the Sterling LS3/6 to be more in line with what the older Classic series sounded like versus anything Spendor is making today.I have to strongly disagree. I own SP2/3R2s and find them to basically sound like a scaled-down SP100. They're just a little less detailed and of course, cannot play as loud.
I owned the Stirling LS3/6s for a few weeks. While very good, they are far brighter than any Spendor I've heard and quite lacking of warmth in comparison. The Stirlings produce a washboard-flat monitor sound.