Logo means next to nothing, there could be hundreds of different batches of pills that look nearly identical in terms of color and imprint. If you're using a website like www.ecstasydata.org or www.pillreports.com and happen to find some matches you would then have to narrow the results down by looking at the more detailed characteristics of the pill. These include the size in mm, specific tablet shape, presence of a split, speckling.
If the pills in your area are that risky the only thing to do is get a regeant testing kit.