Interestingly, all these tunings create a fundamental from a low of about 3F# (185hz) to a high of about 3G# (207) with varying amounts of resonance and head feel.Ron Bonham said:239/386
320/362 both Mark Schulman's settings
320/385 Steve Smith's setting
Which has pretty much been my observations. A 3F# 185hz tuning is a nice fat snare, a 3G 196hz is a nice medium sound with good pop and some meat, and a 3G# 207hz is a great crack/pop higher tuning.
If you want the really high reggae type crack, go higher than 207hz. If you want a super low fat sound, go lower than 185hz.
I do wish tune-bot would provide a snare calculator. Their calculator only does toms and they give snare tunings in their guide and there are also artists tunings with snare information.