What’s the best way to compare camera quality in today’s top phones? By now, even most moms know that megapixels (MPs) aren’t everything. Sure, your old lady may not think in terms of sensor size, texture, and contrast, but she knows great photos when she sees them, and they’re not all coming from the 41-MP Lumia 1020.

Like Mom, however, many of us still quietly assume megapixels are important, even if they don’t tell the whole story. We tend to think about megapixels like wine prices: a $45 bottle may not be three times better than a $15 bottle, but on average, it has to be at least somewhat better, right?

Not so fast. We took a look at ratings from DxOMark for today’s most popular mobile phones, then charted them against megapixels. DxOMark has long scored the quality of traditional cameras by focusing on RAW images, stripping away the effects of converters and focusing on the empirical quality of the image, as captured by the sensor and lens. More recently, they’ve begun rating mobile phone cameras with a similar diligence, reviewing smartphone images based on seven factors, including color, texture, noise, and artifacts — across both still images and videos. They take at least 400 photos and shoot over 20 videos in both real-world and lab conditions to determine the quality of each device’s camera. Here are the current scores (out of 100) for the 19 phones they’ve tested so far: