That pic was sent to a Biologist as I also thought it would be a record as Sauger normally don't get that big. It was classified as a Saugeye. Too bad that AB doesn't recognize it as a separate species but a Hybrid. In the States, the record is a little better than 7 lbs.
It was from my one of my favorite haunts, the Red Deer river. I released the fish hoping that Genetic line would carry on
As for taste, I've never noticed any difference in taste or texture. Smaller fish will always taste better than the bigger as the river systems they are found in have Mercury levels. Less concentrations of toxins in smaller fish.
There's a few Southern Reserviors down Lethbridge way that do have both species. Although I have not personally fished there yet but I was told that St. Mary's Reservoir has both species. Can't remember exactly which river, but there is a canal system from a River that feeds into some of these Reservoirs down South. If you can obtain a map from EID or WID, they have alot of useful info.
For example, there is Rainbows caught in Chestermere, MacGregor, Travers, and Little Bow Reservoir. All of these have one thing in common. They are all fed from the Bow River in Calgary.....
Whenever you have Reservoirs that are being fed from a river system, expect to find the same species of fish in that watershed..