With the unveiling of the updated ASUS ROG Zephyrus Duo 15 (GX551), we thought now would be a great time to talk a little bit about its predecessor, the ROG Zephyrus Duo 15 (GX550), with a focus on what is different and if this new and improved version is the device to go for, despite the fact that the older one will probably get discounted and the new one has the premium price tag.

Starting off with the design, it is mainly unchanged, which is good. The metal body provides the structural support that a device of these proportions needs.
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https://laptopmedia.com/comparisons/asus-rog-zephyrus-duo-15-gx550-vs-asus-rog-zephyrus-duo-15-gx551-what-are-the-differences/