It all depends on the specs of the specific model. They'll have different strengths and weaknesses. Same as expensive models. What you'd get in an expensive ultrabook is different than an expensive desktop replacement gaming laptop. Same as a cheap light laptop versus a cheap large laptop.
In general
- Screen Quality: Lower Contrast, Gamut, Color Accuracy, Resolution and view angles.
- Storage: Slower storage or less storage. Really depends if it is an SSD or HDD. When using an SSD it is usually a small and cheap model. High end units may be using NVMe SSD.
- Casing: Cheaper materials and thicker
- Keyboard: Varies a lot but probably not as good quality same with the trackpad.
- Ports: High end models may have USB 3.1 Gen 2 and...