I'm looking for a relatively cheap casual laptop that can play reasonably well games (which do not need too much power).
Option 1: Lenovo IdeaPad 330, 4GB RAM, Intel 5, NVIDIA GeForce Mx150
Option 2: Dell Inspiron, 8 GB RAM, Intel 5, AMD Radeon 530
Option 2 sounds better as more Ram.
However, what "Intel 5" it is, you have not specified exactly, so you can say it bad.