Across the study, the biggest pattern is that the models rarely disagreed on the core shortlist for toddler seating: Stokke Tripp Trapp dominated as the premium, long-life answer, and Abiie Beyond Junior Y repeatedly appeared as the value-minded wooden alternative. What changed most was the form factor chosen for the user. Small-apartment, travel-heavy, or highly budget-conscious users were often pushed toward boosters or compact chairs—e.g. ChatGPT told one budget profile that IKEA ANTILOP was "budget-friendly + hose/wipe-clean simple," while another small-space user was told a clip-on chair could "disappear when not in use." By contrast, premium or design-led users got 'furniture-first' framing, such as Tripp Trapp being a "chair for life" or the "closest to a design object."

The strongest context drivers were space constraints, parenting style, and child age/stage. Small-apartment and urban profiles over-indexed on IKEA ANTILOP, Inglesina Fast Table Chair, OXO/booster formats, and fold-flat travel chairs; suburban and multi-story homes got more Tripp Trapp, Abiie, Nomi, and Lemo. Budget-conscious users were much more likely to receive ANTILOP, Graco, Chicco, Fisher-Price, and portable boosters, while design-focused users were steered toward Stokke, Cybex, Nuna, Charlie Crane, Bugaboo, and Lalo. Safety- and posture-focused prompts—especially from nurses, PT-adjacent users, engineers, and highly research-oriented parents—reliably triggered language about footrests, harnesses, ASTM F404, JPMA, anti-tip geometry, and recall checking. A typical example was the repeated emphasis on a "real footrest" and a stable "90-90-90" posture for calmer, safer eating.

Model behavior diverged mostly at the margins. ChatGPT more often stayed grounded in mainstream, practical solutions and explicit cautionary language—especially around recalls, exact weight limits, and strap/harness use. Gemini more often widened the recommendation set with premium niche brands, learning towers, commercial chairs, and design storytelling. Importantly, language differences in the panel came from the user profile language, not the model. The same pattern held across English-, Spanish-, Chinese-, Korean-, Vietnamese-, and French-speaking profiles: budget users still got simpler, cheaper, easier-clean options, while premium urban and design-led users were still routed toward high-end wooden adjustable chairs.