Understand the issue
DAS distributes a signal source across multiple antennas. It can serve complex indoor layouts, but requires careful planning for the source, carriers, cabling and operating model.
What to consider
A small cell provides localized carrier radio service and needs the appropriate carrier integration and backhaul. A booster retransmits an existing signal; it depends on a suitable source signal and applicable authorizations.
Make the next step useful
Compare the building layout, carrier mix, user demand and ongoing costs before selecting a system. Coverage improvement and additional capacity are different objectives; do not assume every option solves both.