True, whether they are aggressive chewers or not is a huge factor. My Nashi is the most aggressive chewer I've met. He's never had issues with antlers, but I worry so I don't let him have them for too long.My 8.6lb dog has chewed on both deer and elk antlers without any major problem but he's not an overly aggressive chewer. He likes the ones that are split so he can get to the marrow.
Make sure to supervise your dog with them as I've had my boy manage to crack off shards of his last one and I had to take it away.
Personaly I would not give any dog an antler or similar for chewing. Rule of thumb on dog chews is that if it's too hard for you to make an indentation with your thumb nail then it's too hard for your dog to be chewing on. I've seen way to many fractured teeth and been involved with way to many 2 hour plus tooth extractions that it's just not worth it, unless you have no issue spending $1000 for a surgery that could have easily been prevented. There's much better options for keeping your dogs teeth clean and keeping them entertained during the day.
The golden standard for keeping teeth clean would be to manually brush the teeth every day, ideally even twice a day just like we do for ourselves. Unfortunately most owners will not even consider trying to brush their dogs teeth or their dogs just won't tolerate it. At my work we offer CET chews and veggie dents as an alternative if the teeth brushing is just not going to happen. A lot of raw diet people recommend uncooked chicken wings or turkey necks, I've never personally done this since I have coated dogs and can't feed anything that will get caught up in the hair, I hope there's someone out there who's does feed these things and can chime on it.