I've vividly explained that both of these activities are different and have pros and cons. Contrarily, skateboards are better for beginners because they offer standing support and space for standing on them. While rollerblading is better for flips and tricks because your feet are secured and fixed into boots. I found rollerblading more fun. In the end, your liking or disliking preference might not be the same as mine, so decide on your own!