this has been debated many (to many) times do a search and you can find a ton of post on this. Both vendors make good kits what would I buy personaly Razors I do not have one on either of my cars but have helped install 6 kits locally and I will be puting a kit on the we4/limited
An option in deciding which kit to go with is to look at who is more readily available for questions, thats what i did. I have a RAZOR's kit by the way, installed today