OK, I know the difference between Brain **** and Practise Exams, but is there any way to tell the difference? I have seen sites claiming that they are Microsoft Certified Practise Test centers. My motto is 'trust no one'

I don't want to post their names because if they are not legit I don't want to 'promote' them on here, but they have this logo on their site:

What do you guys think?