Difference in percentage points for 6sense Native Email?

Curious what "Percentage points" means in this article? https://support.6sense.com/docs/set-up-the-6sense-email-provider-for-ai-email

Engagement metrics (like open rate and response rate) are typically 5–10 percentage points lower when sending via 6sense compared to Outlook or Gmail.

From our tests and benchmarks, average opens on Outlook/Gmail were ~40–50%, whereas on 6sense native email provider they were ~35–45%. Similar drops are expected in reply rates. This is the trade-off for the increased volume we can send through 6sense. 

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