USFS mustered my sweetie-pie to a wild fire near Weaverville, CA a few days ago, hence free time for opinions/observations. She called a few minutes back to check on bachelor behavior. She doesn’t care for my whistling but said after ushering a “Boys of the Lough” show that “Cathal McConnell really knows how to play it!-not like you!” She was forgiven for being the cold light of dawn by then producing a CD signed by them. What a gal! 
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-Susato standard bore non-tunable soprano D:
Loud, chiffy-toned, needs thorough warmup for good pitch but is fun to play, responsive and sturdy. Loud whistle gets much louder at high A or above. Timbre and volume of this whistle carries well oudoors, - too loud for indoors at or above high A.
-A good value-
Favorite tune on this: -Anything played outdoors!
-Susato VSB (very small bore) tunable soprano D: Thin, pure, pipey tone but well-tuned with easy high octave. Mine arrived with tone holes lined up in a shallow arc from top to bottom, but its tuning is fine and the tone holes are so small the arc doesn’t hurt it. This is a favorite for picking through new tunes as its easy to play and the high octave has tolerable volume indoors. (Mostly) -Maybe the tone hole arc is a feature! 
-Small bore makes for crisp ornaments and pipey tone makes cheerful, lively tunes a natural.
Favorite tune on this: Off To California
-Sweetone soprano D-Well tuned, chiffy, cheap whistle
and a good value
-Sweetone C: Similar conical design to the D whistle but in poor tune
-Silkstone alloy soprano D+: Elegantly made with loud, fairly pure metallic tone which sweetens some when warmed up. Clogs easily until warm but responds well to detergent/ Jet-Dry treatment for clog prevention. Perfectly tuned with a C note available below D bell note. Very, very loud at top of second octave, short flings and bursts of it delightful but loud regardless. Low C note useful for “Maria” from “West Side Story” or for the “Simpsons” theme. 
Favorite on this: Banish Misfortune
-Water Weasel tunable Bb: Loud, well tuned, sturdy full-sounding whistle with meaty, pleasant tone with some chiff, plays reliably and clearly through both octaves, large tone holes make for nice slurs. Responds well when played with authority. Louder still above middle of high octave but not screechy-just louder, responsive and pretty. Favorite tunes on this: Anything you’d want a fully present, open and pretty tone for. -Satisfies by playing nimbly in good tune with good tone and volume. mmm…good! -Versatile for pensive airs or lively reels.
-Water Weasel tunable low G -Mellow toned in low octave, perfectly tuned whistle with gargantuan tone holes, quite loud at top of high octave. Good volume in low octave too, responsive when played with authority, mellow in low octave, nimble in high octave-
Favorite tunes on this: Anything at all. -Water Weasels I’ve played all need a certain authority of play and respond well to it.
-Casey Burns standard keyless blackwood flute, unlined head with tuning slide, silver rings & single-dimple embouchure cutaway:
-Handsome, Pratten-ish keyless flute with solid low D note and rich low octave, medium sized holes, well tuned. Sweet upper octave can be had with practice, low octave can sound too round or hollow without proper embouchure, blowing angle & cork position–given these it rocks with a malleable, driven tone, somewhat dry but seductive and powerful in low octave and sweet or rough higher up (your choice) when well played. Its the only flute I’ve had for more than a day, nearing the four-year point now. Favorite on this : The Poor Scholar
These are not for sale, just posted for information and debate. No retorts yet? Somethings gotta give.