Ghost 18 vs InfinityRN 4
How these two compare on everything we measure — where the AIs rank them, what reviewers and buyers say, and how they price. The differences are the point — they decide which one is yours.
Side by side
Every signal we hold, on one shared scale. The leading side is lit — and where the AI panel and the reviewers pull apart, the row says so.?
Built from what 3 AI models (Gemini · Perplexity · Claude) recommend for real buyer questions, layered with reviewer test summaries, Google buyer ratings, street prices and press. The short answer and verdict are derived from where those signals diverge — not written by hand for either product.
Independent — not a vendor, not advertising, not a paid review. How we score →
Which is better for what
Across the buyer-questions both appear in, who the AI panel ranks higher — and the widest gaps.?
Critics & buyers
The human jury in one chapter — what the video reviewers score and say, the reviews behind it, and how Google buyers rate them.
What reviewers say
Distilled from the video reviewers — the score, what they praise, where they push back.?
Reviewers praise
- Excellent step-in and all-day comfort, with a well-padded heel collar and improved tongue delivering a secure, cushioned fit
- Smooth, stable ride that transitions cleanly through the stride without instability or ankle-roll risk
- Highly durable outsole with thick rubber coverage that holds up well over high mileage on road and mixed surfaces
Reviewers push back
- Runs on the firmer side and requires a noticeable break-in period before the foam softens
- Slightly heavy for a daily trainer, which some reviewers found limiting compared to lighter competitors
- Lower stack height and traditional ride feel dated against higher-stack, softer alternatives in the same category
The Brooks Ghost 18 is a dependable, comfortable daily trainer with a smooth, balanced ride that reviewers broadly recommend for everyday runners, though most note it feels firm, traditional, and unexciting compared to more modern alternatives.
Ride feel divides reviewers: one found it natural, softer, and more efficient than expected, while others describe it as firm and old-fashioned with minimal cushioning underfoot
The reviews behind this
The actual video reviews the summary above is distilled from — tap any to watch on YouTube.
What buyers say
Aggregated Google Shopping ratings — the score, the aspects owners rate, and a real quote.?
The verdict: which to buy
Our read of everything above — who leads each point, and who each is for.
Net: Ghost 18 leads 2 of 4 · InfinityRN 4 2.
Which one is right for you
How each suits the seven buyer types — a good fit, a maybe, or not for you.?
Each leads on different points — pick the one strong where you shop.
We don’t crown a winner. Both are strong; the differences above decide it for your use. Where a signal is missing, we leave it blank rather than guess.
as of July 6 · 3 shared buyer questions?
Common questions
The questions people ask comparing these two — answered from the data above.
The AI panel ranks Ghost 18 higher (avg #7.8 fused across 5 questions in Running Shoes vs #11.5), but it’s close — reviewers and buyers split differently.
InfinityRN 4 — $64 vs $150 across retailers.
Google buyers give Ghost 18 4.1 and InfinityRN 4 4.4 out of 5.
Its predecessor in the line is the Ghost 17. We track Ghost 18 at #7.8 on the AI panel and 3.5/5 with reviewers; the Ghost 17 page shows how the older model holds up.