I have: Northland (3) (8-12 yrs) - My favorite. Smaller berries but prolific and very good flavor, long harvest period, ripe when blue. Wide growing plant, very hardy, good producer of new shoots.
Duke (8 yrs) - Nice larger berries, sweet, ripe when blue, earliest (though they all are not that far apart). More upright grower. Little to no winterkill. My next favorite to NL.
Chippewa (3 yrs) - Similar to Duke I think but it’s young so not a lot of history. Berries are darker than all the others, good flavor. Had a little tip winterkill (could be due to being young). Looks like it will be an upright grower.
Blueray (12 yrs) - had a rough start (poor plant) so took awhile but now it is a good producer, fruit med-lg good sweet flavor, pretty pink when immature, somewhat later crop, a little tip winterkill, tallest of my plants.
Patriot (2) (12 yrs) - healthy plts but slow to put out new shoots, 2nd to ripen after Duke, largest berries with good flavor IF fully ripe which is hard to see and have to wait after blue for some days. Light winterkill. I’m considering replacing these just because of the “when are they ripe” issue. (so I’m following this discussion with interest!)
Bluecrop (8 yrs) - very poor plant to begin & took a long time to get over its beginnings so probably not a good test, plus it’s in the lightest soil of the plot. Fruit is good but more winterkill than others. I keep saying I’ll replace it but hate to give up on this trooper.
I find the differences overall aren’t that great and change year to year as far as who’s first or last to fruit, flavor, size of plants. Our season is roughly 3rd wk of July to 3rd wk Aug. Winterkill has been minor, just tips except for BC so I’d say the rest are pretty hardy. I like the variety. Thjankfully we’re in blueberry country with ‘blueberry happy’ soil. Nice to have something that grows well here! Sue