Your skin is lighter / less pourous looking and your cheeks are a bit puffier. Skin tone does alot for feminizing features, and from what i've seen with other MTFs, is usually a change that takes place within the first 4 months of HRT. What's amazing is how quickly the fat in your face is shifting. I've outlined where it appears the fat is in your face in the photos taken. Maybe the OP can confirm whether I'm right?

From what I see, the fat moved from surrounding the mouth, to areas which curve your face. Smiling kind of makes it happen more, so IDK if this image can be pointed to for showing whether that is why you look more feminine. Either case, my observations of men and women facial features usually relies on the areas outlined above.
You were a handsome looking guy btw! You look good as a female, and for only 2 months, I can only guess you have just scraped the surface of changes to come! Gives me hope, because I have some similar features in my face.