Hi there, welcome to BYC!
Those are indeed some (hatchery quality) non bearded Silkies... the one on the left definitely being cockerel.
Age looks about right.. thinking the Silkies are older than the the reds due to the size disparity.
I bred Silkies for several years... some of them are complete Stew Pidasso's... starting out with the biting you describe and never get better. At home as a passionate breeder... we eat them boys, tolerate no bullies, and don't allow them to breed their poor attitudes forward... Hatcheries may not be interacting with their flock as much so may not be selecting for personality.... Their poofiness is still coming on. The right one might be a pullet or could be a slower maturing cockerel.. too soon to tell for sure unless they are showing their boy traits like the left... which I have seen identifiable on SOME (not most) as early as one day old (no joke), had them crow at 3 weeks and try to mate at 4 weeks.
That being said... please realize that if there is an age difference the older Silkies will be getting their hormones a little sooner... which bolsters confidence, increase pecking order antics and competition... and make them seem like a jerk in comparison to the ones who aren't getting those little surges yet. Around 3-4 weeks is when pecking order really starts getting more active. Before that they may be less interested/motivated.
I couldn't make out a third Silkie in the group pic.
Some Silkies are sweet... but that is not my true assessment of them. My true assessment is that they are handicapped when their crest blinds them sometimes making them calm. That along with their short legs make them easy to catch as a keeper. They still keep tight pecking order and bring a huge amount of fight to the party for such a small bird comparatively. They had zero issues holding their own in my mixed breed laying flock. But remember... it always rolls down hill and younger birds are down hill at least until they start getting some hormonal messages that might challenge status quo.
I have seen my Silkie boys take on and put Marans and others on the run.. Their still boys.. Start looking into altering his behavior from biting you, if you're going to be able to keep him.. I don't buy the whole dominance training thing... but there are lots of threads that discuss this and you will have to decide what makes sense and try some things.
I MIGHT try picking him up and carrying him around (always mindful of face attacks)... let him get his biting out without reacting... wear long sleeves or use gloves if needed. Walk around and do your thing... let him calm down and don't put him down until he relaxes. Once relaxed try to put down before too long, (maybe facing away from you and toss some treats in front of him.. might be trial and error). If you react to his bites... putting him down tells him biting (or fighting) works to get his way. But if it doesn't work his tiny little brain has to try and figure something else out. Kicking or other aggressive or challenging behaviors just escalate things most often. I don't like to be seen as part of the pecking order and not as a threat... but as a fixture that does as
I please.. my flock, my hens, my joy.. get with the program.. or take a trip to camp Kenmore to cool your jets.

(at the current age though there should be plenty of time for reform) Positive praise gets better result than negative criticism..
You MIGHT be able to poke him back, finger peck him, or even pull the feather a little on the back of the neck... is how other birds respond to each other. This is what I would usually do if they peck me when interacting once they go to roost... after settled down and dim, I like to approach and pet on their chest as this is when I find they are least flighty.
Just brainstorming ideas... all birds are individuals and your mileage may vary. Hope he adjust well and lives happily with the rest of you flock.