Is this benefit boi-ing concealer fake?

I bought and received one this week too from ebay. I think it is a fake as it came with a bonus benefit concealer brush which is a completely different colour to the one on their website. I can't prove anything either but the quality of the concealer isn't as good as I thought it would be. The price I paid wasn't cheap but it wasn't expensive either. As for the details on the back of mine it is the same as the post before mine. Mine doesn't have a four digit number on the back but the sticker on the back is very off centre (another reason I think it's a fake). There are some youtube videos you can check but they don't really clarify anything for us!