I bought 1031's in '92, and often still use the same pair. I actually like them, for the most part. At least I know how this one pair translates. A couple of years later, I got 1032's and they are also still in use.
However, about 2001, an artist who worked here a lot liked my 31's, and wanted a pair, so we ordered that artist some from the same dealer I got mine.
Things had "changed" inside. The amplifier was different, for sure.
I never liked this newer pair very much, and they have already gone back for repair three times.
Someone else also came in to mix this very artist, and brought 8050's with him.
I tried to use them, and they really threw me off. I just couldn't stand the 8050's.
But that other engineer was able to use them successfully.
Perhaps different, but that's my Genelec story.