At this budget, I would choose the phone that gets the basics right rather than the one with the longest spec sheet. For daily use, prioritize a dependable battery, an efficient chipset, stable software, a bright display, and a local warranty/service path.
For Pakistan specifically, also compare the actual street price and official availability, because the best-value model can change quickly. If two phones are close, I would normally prefer the one with better software support and 256GB storage over a small advantage in benchmark performance.
For battery, do not look at capacity alone. Efficiency, standby drain, mobile-data use and charging speed matter just as much. If you share the two or three models available near PKR 50,000, the community can narrow it down much more precisely.