Definitely flatter than the Scotch and lemon, but slightly more easy drinking. Having had this twice, I did use black tea on the second attempt which we had on hand rather than English Breakfast, because we ran out. Not invigorating, unfortunately. Maybe one needs to splurge?
Lacks something in comparison to the Scotch and lemon. Adding some smokier Scotch (Ardbeg 10) improved it, but not enough that I would drink this over the lemon version.