This "dreadful" berry, with also "local" variations depending on where in world. Also a harder flavor to work with as the strawberry to get it strong bold pronounced in a mix.
Northern Europa´s bluberry is the Bilberry , thas something ive learned first by diy ejuice.... its always been called bluberry here in Norway even from earlier times as far i know.
That berry have a dark blue/black outer skin, and a purple hued flesh, and grow on low bushes. The blueberry, as Southern Europa & US is growing in higher bushes, have a lighter blue color, and is white in the flesh, Billbery a bit more "acidic".
My notes in comparison of a few Blueberry flavors:
6% TFA Blueberry (needs 7+ days steep)
round tasted, artificial as new mixed, Smells bad when steeped, and still artificial. darker noted ripe type.
3% FA Blueberry Juicy Ripe (needs 12-15d steep)
smells wrong, soft round bold flavor, bit sweet, some greness from bush, seems better than many as new mixed. Gets a more jammy note, before gets more riped midsweet true blueberry. Rounded flavor, touch weak acidic notes as should.
6% Blueberry FW, (needs 12-15d steep)
weaker type, bit sweet,candylike new mixed. Gets darker, but also a touch "grape/currant" artificial note, keep sweetness.
1.5% Blueberry FLV (needs 12-15d steep)
not true in taste, too sweet as new mixed. Gets better, but grows a "grapestyled" note, and a soapy smell. Soapy style weakens over time,, still artificial, some "grape" acidic similarity.
2.5% Blueberry Inw (needs 15d steep)
Sournoted, grapenotes? smells alcoholic as new mixed. Goes to a more midsweet "grapenoted" type.
4% Blueberry SSM (needs 12d steep)
smells shit, sweet tasting but a curranttaste, bright note, not a blueberry? Keeps this notes even steeped.
6.5% Blueberry VSO – (needs 7d steep)
-grapenotes here aint directly grape, but a kind of wrong "harshness/acidic"notes - trying to get the flavor more true?
For me it seemes most try to get a ripe darker notes, without direct doing it. Easy gets artificial in taste, or more of a candy type.