Because I live with my brother and I want to do duo FSG

Maybe, because you might be able to find ores faster. That doesn't really affect sub 40 runs, but if your above that you might try mining because your inexperienced speedrunner. Also, you might be able to find the stronghold faster or slower because there are more caves that could have an exposed stronghold and also strongholds might generate a lot lower than 1.16.