The age of a Whitetail buck will determine how large the antlers will grow each year as long as the buck stays healthy.
Spike bucks are usually young bucks. If an older buck has spikes, it may be that the buck wasn’t getting enough food to eat or the right kind of food to stay healthy.
Antlers will come in different sizes and shape.
Bucks will shed their antlers and grow new ones every year. A larger and older buck most of the time will shed their antlers before younger bucks. A buck in good condition will more likely shed their antlers before a buck that is in poor condition.
First year bucks will have buttons or some call them nubs, in a place where their antlers will grow.
Doing the time a buck antler is growing; if it gets damage it can deform the antler. They can damage their antlers by hitting it on a tree branch, or etc. They also can also damage their antlers by fighting with other bucks. The antlers also get a lot of wear and damage doing the rutting season.
The bucks antlers will fall off around March , they will grown new antlers in the spring time
There are photos of bucks here of different sizes and age.