I agree that this is a hatchery quality Speckled Sussex roo. There's no way of knowing if he's a good roo until you see him in person. Watch him with his hens, see if he offers them treats, is alert for predators, intervenes in squabbles etc.
Also, take a look at his flock of hens for injuries or overbreeding. If he is not being a gentleman, they'll be missing feathers on their heads and backs.
And most importantly, interact with him while he's around his hens. Most roos will not be overly friendly, and will keep thier distance... which is totally fine. What isn't fine is if he charges you, attacks you, and wing-dances/stomps at you. These are signs of aggression that could escalate. Along that line, test him by turning your back to him as well. Sometimes aggressive roos will use that as a chance to attack you.
If he passes muster in these categories, then by all means, scoop him up as soon as possible! Good roos are treasures!