The two recordings presented here are of very different quality indeed.
Alcina is a live performance, and the recording quality is not of a particularly high standard. Vocal intensity and clarity comes and goes like the tides on the shore as performers move about or turn away. It's difficult to pass sensible comment on the individual performances. It seems inexcusable to present us with this kind of substandard recording when we know it is perfectly possible to give us live performances of virtually studio standard. Take for example Vivaldi: Il Giustino which is part studio part live, and for me at least it's not possible to work out which parts were recorded in which environment.
Orlando is a studio recording, and needless to say the standard is much superior. William Christie delivers to his usual high standard here.
Three stars (just) for Alcina, five for Orlando, so average four stars.
Presented as six discs in individual card sleeves within a cardboard box with fold open lid, plus booklet. No libretti included, you have to download those from the interweb at the address given.