It depends on your water’s villain profile. Is it hard? (White crust on your kettle). Is it chlorine-heavy? (Smells like a swimming pool).
What Is A Whole House Filtration System at Phyllis Lange blog
If you just want great-tasting drinking water, get the under-sink RO. It’s the king of clean. Pair it with a remineralization filter, and you’ll get that “crisp mountain” vibe.
If you have hard water that leaves spots on glasses, go whole house. Your dishes will sparkle. Your hair will stop feeling like straw. You’ll save money on detergent.