Why Portugal is better than Spain for expats?

Could you please elaborate on why Portugal might be considered a superior option for expatriates compared to Spain? I'm particularly interested in understanding the differences in lifestyle, cost of living, job opportunities, and cultural immersion between the two countries. Additionally, I'd like to know if there are any specific advantages that Portugal offers to expats that Spain might lack. Could you provide insights into these aspects and perhaps compare them side by side to help me make a more informed decision?