Angel looks taller or thinner than the previous game. Her boobs seem to be narrower from the front view - is that due to tight clothing?
There are several factors for changes.
I don't have the old game assets or saved files. Everything got deleted. Everything that I have NOW, I had to recreate. So yes, there will be some minor differences to the previous game.
That being said, there are also other factors, as you mentioned (tight clothing), in order to create cleavage, a woman has to push her tits together, making them less wide looking.
I hardly ever gave Angel cleavage in the first game because she was constantly covered up, however when she is wearing a shirt that exposes her chest, I want cleavage, and therefore her tits have to be pressed together.
There are also other factors such as depth perception and scaling. If you download Daz3d and mess around with it, you'll see all of the issues that creators have to deal with. It's not easy, it takes a lot of time to get an image perfect, and when you're planning thousands of images for an interactive novel, then you have to consider everything from how long it takes to produce one render, edit it, and then finally compress it without taking away too much of the quality and make sure it lines up right in the code.
It takes a lot of work and time I simply don't have to make these renders perfect so you'll have to take what you get, unfortunately that's just the way things are sometimes.