In our previous work, we implemented WMN-GA system which is based on Genetic Algorithms (GAs) and used it for node placement problem in WMNs. In this paper, we compare the performance of Exponential and Weibull distributions of mesh clients for two WMN architectures considering PDR, throughput, delay, fairness index and energy metrics. For simulations, we used ns-3, Hybrid Wireless Mesh Protocol (HWMP) and TCP. The simulation results show that the PDR for both distributions is almost the same. The throughput of Exponential distribution is a little bit higher than Weibull distribution. The delay of Weibull distribution is lower than Exponential distribution. For Hybrid WMN, the fairness index of Exponential distribution is higher than Weibull distribution. But for I/B WMN, the fairness index of Weibull distribution is higher than Exponential distribution.