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core-js vs Microsoft Advertising

Based on 1570 and 240 real audits

View core-js details | View Microsoft Advertising details
Metriccore-jsMicrosoft AdvertisingWinner
Performance3632core-js
Accessibility8889Microsoft Advertising
Best Practices8479core-js
SEO9190core-js
Security6565Tie
TTFB371ms317msMicrosoft Advertising
Composite7272Tie
Performance
core-js
36
Microsoft Advertising
32
Accessibility
core-js
88
Microsoft Advertising
89
Security
core-js
65
Microsoft Advertising
65
SEO
core-js
91
Microsoft Advertising
90
Composite
core-js
72
Microsoft Advertising
72

core-js outperforms Microsoft Advertising in 3 of 7 categories, with a stronger composite score (72 vs 72). Microsoft Advertising leads in accessibility, TTFB.

When to choose core-js

Choose core-js when your primary concern is best practices and performance. Its audit data shows consistent strength in these areas across the sampled sites.

When to choose Microsoft Advertising

Choose Microsoft Advertising when your primary concern is server response time and accessibility. Its audit data shows consistent strength in these areas across the sampled sites.

How this comparison was built

Scores are medians across 1570 audited core-js sites and 240 audited Microsoft Advertising sites in the BeaverCheck database. Every audit runs the same 100+ checks — Lighthouse performance, security headers, accessibility, SEO, server response time — against a real URL. No vendor input, no sponsorship, no affiliate links. Read the full methodology →

FAQ

Which is faster, core-js or Microsoft Advertising?
Based on real BeaverCheck audits, core-js sites score higher on Lighthouse performance (36 vs 32 on average).
Which has better security, core-js or Microsoft Advertising?
core-js sites score higher on security analysis (65 vs 65 on average).
Which has better accessibility, core-js or Microsoft Advertising?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Microsoft Advertising (89 vs 88). Both technologies can be made fully accessible with care — the difference reflects common patterns in the sampled sites, not inherent platform limits.
Which is better for SEO, core-js or Microsoft Advertising?
core-js sites score higher on Lighthouse SEO signals (91 vs 90 on average), which cover meta tags, crawlability, mobile friendliness, and structured data. Content strategy and backlinks still matter more than platform choice for ranking.
Which has faster server response (TTFB), core-js or Microsoft Advertising?
Microsoft Advertising sites show lower Time to First Byte (317 ms vs 371 ms on average). TTFB depends heavily on hosting and CDN setup rather than the technology itself, but the sampled sites suggest a meaningful difference in common deployment patterns.
Should I choose core-js or Microsoft Advertising for my website?
Both platforms have trade-offs. core-js scores higher on overall composite score while core-js may excel in metrics you care about most. Run a free BeaverCheck audit on a real site using each to compare the metrics relevant to your use case.
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