Is there a specific body type that is better at dieting?

I am curious because it seems that even if people diet using the same method, some lose weight easily while others do not.

Is it really true that there are body types that lose weight easily and those that don't?

I would also like to know if basal metabolic rate or genetic factors make a significant difference in weight loss.

I am also curious if there is a way to change one's constitution if changes are slow despite consistent effort.

For those who have successfully lost weight, please let me know which habits or methods were the most helpful.