Seeds in buds will change the bud growth. My experience was that as a percent by weight, the seeds were about 28% of the total bud weight. There is a perception that seeds will "ruin" the bud. The only way the bud was degraded, was that it spent energy on producing seed, and therefore there was less weight of consumable bud. That said, the bud remaining after harvesting seed had potency on par with buds that were not pollinated. Additionally the buds with seeds were broken up and shredded to remove the seed. If your situation is that the esthetic value of the bud is important, that is also a downside. Most people's bud gets broken up and ground before consuming anyway. Mine went to tincture.
A bud that has been pollinated will show a more rapid change in the white hairs turning to brown. If your goal is to make seed, I recommend letting the plant grow older than normal, ideally wait until the plant starts dropping seeds by itself, then harvest. If there are unpollinated buds those can be harvested earlier. When letting a plant age out keep a watchful eye for mildew and rot.