LS3/5A vs. LS3/5A

I have owned Spendor LS3/5A's for 20 years, and always heard that all LS3/5A's sounded pretty much the same. Yet I have also heard that the speakers have been improved somewhat over time, so my curiosity got the best of me and I purchased a 3 year old pair of the Rogers. I was quite surprised to find that, IMHO, the "old" Spendor's sound much better than the "new" Rogers. While they obviously have much in common, the difference between the two was not at all subtle. The Spendor's are more transparent, throw a larger soundstage, and do a better job resolving inner details. In short, they are better at what I have always identified as the main strengths of the LS3/5A. Any comments on this from those of you who have experience with this speaker?