Topic
Two AI engines disagree with each other about page citations more than either disagrees with classic Google organic ranking. Arc continuation: Day 17 (Jul 30) covered LinkedIn as the #1 AI citation source for professional queries. Day 18 turns the lens onto engine-vs-engine disagreement itself, using a fresh WP SEO AI data study (published Jul 14, 2026, 17 days old, follow-up to their June 2026 study).
Key stats used
- WP SEO AI compared Google AI Overviews (Google Search Console AI export) against Bing-powered AI / ChatGPT search / Microsoft Copilot (Bing Webmaster Tools AI Page Stats export) across 1,000 pages, 5 languages, 3-month window ending Jul 12, 2026.
- Spearman rank correlation, organic Google search vs Google AI Overviews: 0.61 (810 shared URLs).
- Spearman rank correlation, Google AI Overviews vs Bing-powered AI: 0.29 (270 shared pages) — lower than AI-vs-organic, meaning two AI engines order the same cited pages more differently than an AI engine differs from a 2010s-style ranking algorithm.
- Top-50 overlap is nearly identical across both comparisons (25/50 organic-vs-Google-AI, 26/50 Google-AI-vs-Bing-AI) — the disagreement is about ordering, not just which pages show up.
- Driver #1: language. Bing AI citations on the test site were 56% German / 25% English; Google AI impressions on the same site were 85% English / 12% German — a near-complete inversion.
- Natural experiment: the German version of one page pulled 776 Bing citations / 2 Google AI impressions; its English twin pulled 0 Bing citations / 1,151 Google AI impressions. Same topic, same structure, only language differs.
- Driver #2: content format. English listicle/question-format content favors Google AI by up to 55x; non-English how-to/best-of content favors Bing AI.
Source: wpseoai.com ("Do Google AI Overviews and ChatGPT cite the same pages? [Data Study]", Max Schwertl, Jul 14 2026).
Draft post (reach-fix protocol: text only, no carousel, ~750 chars, tags WP SEO AI not self)
Two AI engines, same page, wildly different opinions.
WP SEO AI ran the numbers: Google AI Overviews vs Bing-powered AI (ChatGPT search + Copilot), using rank correlation, not just overlap.
Organic Google vs Google AI Overviews: 0.61
Google AI Overviews vs Bing AI: 0.29
Two AI engines disagree with each other more than an AI disagrees with a decade-old ranking algorithm.
The driver is language. On one site, Bing AI citations were 56% German, Google AI impressions on the same pages were 85% English. One page's German version: 776 Bing citations, 2 Google AI impressions. Its English twin: 0 and 1,151.
"Optimizing for AI search" isn't one job. It's at least two, and they don't converge.
Which engine is your content actually reaching?