This article aims to distinguish Acer Predator Helios 300 (15″) from Dell Inspiron 15 7577.

Starting off with their hardware options, both notebooks sport 7th generation Intel Core processors. However, the Acer representative comes with the full version of the NVIDIA GeForce GTX 1060, while its competitor features NVIDIA GeForce GTX 1060 Max-Q which is slightly less powerful, as well as NVIDIA GeForce GTX 1050 and 1050 Ti GPUs. In addition, Dell Inspiron 15 7577 offers a larger amount of memory at up to 32GB of DDR4-2133 RAM.

In terms of display options, both laptops accommodate 15.6-inch IPSpanels with Full HD (1920 x 1080) resolution but Dell Inspiron 15 7577 also comes with a 4K UHD (3840 x 2160) one. The differences in the overall dimensions are not so extreme, however, the Dell device is slightly thinner at 24.95 mm and 50 grams less heavy, tipping the scale at 2.65 kg (5.8 lbs). Construction-wise, both devices feature aluminum for their chassis.
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https://laptopmedia.com/highlights/acer-predator-helios-300-15-vs-dell-inspiron-15-7577-what-are-the-differences/