The increase or decrease of weight can not fully reflect a person's figure, but also consider factors such as body fat rate. If a person gains weight, but the body fat rate drops, it means that their figure may be better.
In addition, personal height should also be considered. If a person is taller, 90 kg may look thinner, and 104 kg may look moderate. If a person is short, 90 kg may look a little plump, and 104 kg may look fatter.
So we can't simply compare Pamela's 90 kg with 104 kg, but we should consider more factors to evaluate a person's figure.