"I find Panni's tempos a bit awkward and slow - especially compared to the fiery bluster of Marin. I also think Marin's set has an all-around more even cast, and that would be my choice recording. I know, I've heard all about La Studer and Larmore's onstage gaffes, but in the studio they were just fine. Gruberova of course is phenomenal in the coloratura, but beyond the breath-taking runs her performance still comes up as bland, the dramatic moments are pallid and unconvincing. She has an easier time portraying fear or outright horror, but I can't buy her threats (especially compared to Studer).
Florez fans will want to note that this is already an old recording (though only recently released I believe). So expect a beautiful voice that is a work in progress.
In short - if you're only getting one Semiramide, this wouldn't be my choice. I would get the Marin set (most consistent), or the Southerland/Horne for the best Semiramide/Arsace solos and duets."