LA 200 is more broad spectrum and easier on their organs. If you are looking to give a preventative, I would lean towards that. However, realize that the antibodies in the colostrum from the doe are going to fight off any infection (passive immunity), so unless you have a really good reason, you probably don't need to give antibiotics at birth. I personally don't, tho I know a lot of people who do. Both seem to have good results.
Draxxin is a very powerful drug, and works great. I just feel like it is too harsh for a newborn unless they hit the ground sick, wheezing, pneumonia, etc.