Use Perplexity when the source trail is the product
Perplexity should win the shortlist when the user is trying to quote, verify, compare, or share an answer and needs visible citations before trusting it. The chat-search and research-tool briefs both position Perplexity as the cited web answer engine, including Research/Deep Research workflows and plan fit for frequent research. The page should therefore emphasize evidence trails over generic assistant breadth.
Choose Gemini when Google context and multimodal work matter
Gemini becomes the practical pick when the buyer wants one assistant tied to Google Search, Android, Workspace habits, images, files, and everyday productivity. It can still support research, but the value proposition is broader than citation display: it is about staying inside a Google-centered workflow while switching between writing, image understanding, summarization, and assistant tasks.
Do not treat research mode and assistant mode as interchangeable
A fair pilot should use two task sets: source-sensitive prompts where every claim needs a link, and productivity prompts where speed, multimodal context, files, and ecosystem handoff matter. Perplexity should be judged by citation usefulness and source quality. Gemini should be judged by workflow coverage and whether Google context reduces friction for the user.