Are there any differences between preparing/cooking a turkey that was labeled "basted with real butter" vs a regular turkey? I've roasted numerous turkeys numerous ways, but never bought a turkey that was basted with butter. I've always just bought a regular turkey, usually I brine it, and then roast it. I've always had great results. As I've never thought to buy one, I've never given it any thought.

I got this turkey for free and am wondering any considerations I need to account for with this pre-basted turkey? What would happen if I brined it?

Edit:
Here's the actual product: 
http://www.presidentschoice.ca/en_CA/products/productlisting/pc_young_turkey_basted_with_real_butter19732.html
Chances are most likely that it will be just fine. I suspect the brine process will "wash away" a lot of the butter stuff. I've worked in a meat shop before and the only concern I've ever heard expressed about them is dairy allergy, so do keep that in mind. Otherwise, I would (and have) just cook them as you are used to.