Materials
The Fender Starcaster is made from alder, while the Squier is made from agathis. Alder is a more resonant wood than agathis, which means that it produces a richer, fuller sound. Additionally, the Starcaster features a maple neck with a rosewood fingerboard, while the Squier has a nato neck with a laurel fingerboard. Maple and rosewood are both more stable woods than nato and laurel, which means that they are less likely to warp or crack over time.
Construction
The Fender Starcaster is also more carefully constructed than the Squier. The Starcaster features a bolt-on neck, while the Squier has a set neck. Bolt-on necks are easier to adjust and repair than set necks, and they also create a stronger bond between the neck and the body of the guitar. Additionally, the Starcaster features a higher-quality bridge and tuners than the Squier, which means that it stays in tune better and is less likely to break.
Playability
The Fender Starcaster is also more playable than the Squier. The Starcaster has a more comfortable neck shape, and the action is lower than on the Squier. This makes it easier to play fast and technical passages on the Starcaster. Additionally, the Starcaster has a more versatile sound than the Squier, making it suitable for a wider range of genres.
Overall
The Fender Starcaster is a better guitar than the Squier in terms of materials, construction, and playability. If you are looking for a high-quality guitar that will last for years, the Starcaster is the better choice. However, if you are on a budget, the Squier may be a more affordable option.