I have used both and I personally like Find-A-Code better than AAPC Coder. The difference between the two is that AAPC Coder has three levels you can choose from and it is a bit pricey in the highest level which you can get CEUs. Find-A-Code is more reasonable as far as the price is concerned and you can add the extras which you would have to pay. Both comes with a free trial versions so you can see if they are a good fit for you.