Soprano Cornetto in 440hz is probably the best starting point for most people. Depending on where you live and what other musicians you have around you, most people will likely play renaissance music in either a=440hz or 466hz.
Soprano Cornetto in 466hz is one semitone above 440, and is a great option if you want to play with musicians using the more historically "correct" renaissance pitch of 466hz. It's also a great option for playing with ensembles using a=415hz as pitch standard, as you then can transpose down one whole tone, usually getting a somewhat playable key signature.
Soprano Cornetto in 492hz is tuned one whole tone* above 440hz. It is very nimble, and has a slightly brighter sound, though still far from the brightness of a cornettino. Perfect for example if you need to cut through an ensemble a bit more, or just need to get to a more playable key.
(*technically, in equal tempered tuning, one whole tone above 440hz is more correctly 493,25hz. 492hz is a tuning used historically. Our 492hz cornetti can however easily be played in both these pitches by adjusting the mouthpiece accordingly)