While preference is a big factor, your choice should depend on several things. If you have a large living room where many family members and visitors drop by, a sectional is better. After all, it is more conducive to interactions and some friendly banter. If you want to maintain some space between your visitors, then 2 sofas would do the trick. While it's not designed for easy conversation, you can arrange them in a way that promotes this. Two sofas, while more expensive, may prove to be more comfortable for guests as well. Remember, the middle part of the sectional usually doesn't have armrests.