Hi. A Blend with a slighlty higher Malt content will usually say "Deluxe" on the bottle, even higher Malt content than that would say "Superior Deluxe".
Blenders are very secretive about what or how much goes into a blend so to say one particular brand to say it it "the highest" would usually be a marketing pitch.
I tried a "Superior Deluxe Blend" last night, the box says that there are over 30 Speyside Malts in it, but no mention of which ones or proportions. All I can say is that it was very nice