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Two tools, one machine, and a decision to make. Each page argues both sides against the same low-spec brief before it commits to one.
Immich vs Paperless-ngxBoth are library apps that index everything once and then sit quietly. On a two-core NAS the real difference is what that first indexing pass costs you.Ollama vs llama.cppOllama is llama.cpp with a friendly front door. Which one to install depends on whether you want a service or a tool.Open WebUI vs LocalAIOne is a chat front end, the other is the runtime behind it. The useful question is which layer of your stack is actually missing.
Comparisons are assembled from the same tool pages you can read in full. Where a figure is a vendor claim rather than something we measured, the comparison page says so on the line itself.