Here are two 100% crops from portions of the two images. The first is from the image on the left, the second the image from the right. You’ll need to click on each image to view the 100% crop.
Before we go there though, here are the two images again, for your reference (click on the image to view a larger version).
Okay, here is the 100% crop of the LEFT image (make sure you click to view it large):
And here is the 100% crop of the RIGHT image (click to view it large):
Does this now help you work out which was the 5 frame exposure blend and which the single Raw file?