First off, both great Yeshivas. Second, iv’e met boys from both places, and asked them about their respective Yeshivas, and this was the most common answer: Mercaz is a place where guys have very good learning, and encourage the guys to grow on their own pace. Toras Chaim on the other hand has an extremely high level of learning, and the boys are also looking for growth, but come in more serious right away and is quickly becoming the top and hardest first year yeshiva to get into in Israel due to the sterling reputation of the Rabbiem and boys, and gorgeous new facilities. But don’t get me wrong, they say Mercaz is still also one of the top yeshivas.