First, their actual economic ability. Generally speaking, resin car models have higher positioning, more attention to the accuracy of appearance and details, and higher visual reproduction than alloy car models. Because the resin model relies more on manual production, the output is limited, and it is often more collectible than the alloy car model that can be mass-produced, but the price is rising. For example, the price of high-end hand-painted resin models such as MR and BBR may be two or three times that of advanced alloy models with the same proportion, which is basically the same.
Second, personal interests and collection purposes, resin car models strive to be perfect in appearance, but unfortunately most of them can only look and not move, and are only suitable as pure ornaments. There are resin car models with moving parts (for example, several models of FrontiArt Art), but the number is small, and there are few choices, which are basically sky-high. If your interest is not only viewing, but also learning and playing, then the alloy model is undoubtedly more suitable. If you are confident in your hands-on ability, you can also DIY according to your own interests, disassemble and replace parts at will, and change paint and spray patterns. After all, the alloy is far stronger than the resin, can withstand such tossing, and is easy to preserve. In terms of playability, the alloy car model is undoubtedly better.