Ogres and trolls are rather similar except for two things - one, where their mythology originated (Ogres from France and England and Trolls from Norse mythology and Scandinavian folklore) and two, there seems to be more variations to the different kinds of trolls versus ogres.
Trolls appearance vary greatly in various stories. Some stories say that trolls are old, incredibly strong, slow, and dimwitted, although this is only the case with the males as the females trolls may be quite cunning. Another difference between male and female - males are ugly with big noses, long arms and lots of hair, while females are beautiful. Sometimes the only way to distinguish a female troll from a human women is by their dress - a female troll will be too elegantly dressed for walking in a forest.
Some trolls are man-eaters. Some are said to turn to stone when the sun touches them. Some are fiendish giants. Most are ugly, may have tusks or only one eye. However, some stories say that trolls look like humans, not hideous at all, but they live far away from humans in hills, caves, or mounds.The wind-troll Ysätters-Kajsa could dance on the wind or fly. I combine mound trolls or haugtrold with the ability to dance on the wind when I created my race of trolls in my Kingdom of Arnhem trilogy. They first make their appearance in the middle book, Knight of Glory.