You'll have to read the labels to decide which one is best.
Don't expect good control if the plants have already bloomed. Best stage for control is rosette, early in the season. Guess you can be ready next spring, or try spraying again in the fall.
BTDT. It's called; "2 4 D". Tractor Supply carrys "Pasture Pro" along with a broadcast sprayer from Northern tool will fix you right up. 1 1/2 quart per acre in 25 gallons water applied ~4 mph from 4 wheeler/pickup/tractor........2 weeks and all you'll have is black spots vs. flatweed.
You'll have to stay on top of it, but in a couple years the weeds will lose...more or less.
Nearly all of what I post will be controversial to someone. Believe nothing you read on a chat room, research for yourself and LEARN.
Not in the 42% or the 96%