Hey! Something that stands out to me when I look at your drawing is that the darker halftone is barely noticeable, but in the reference I think there is quite a big area in the lights that is darker. I see it like a whole wide strip down the middle of the pear, as well as a narrower strip along the edge of the shadow at the bottom that you did include in the drawing. If that makes sense haha. You can really see it if you squint! Hope this helps :)