That looks like what comes out of some of the tubes I've got. I don't know any more what to say about the Singer Lube. My personal opinion based on some of what I have read, is that the white colored grease is not for the motors, but for the gears.
The brown or amber colored grease should be for the motors. I wouldn't worry too much about the color from one tube to the other as it's probably been made by a zillion manufacturers over the years.
That's just my opinion and I won't swear it's right. All I know is I use the non white stuff no mater it's age in my Singer motors.
Joe