@Duacar Hi, both are good choices. If you already have a 3-pack Deco X20 kit, you might be quite familiar with its performance, and getting a second kit will be much easier.

And you could refer to this link to compare the details between Deco X20 and Deco X50：

https://www.tp-link.com/en/compare/?typeId=5700&productIds=52557%2C58736

Thank you very much.

Best regards.