Why can GSC click data and GA4 Organic Session data differ? Insights wanted.

Hi everyone, I was wondering why Google Analytics Organic Sesssion data and GSC click data can deviate. GA4 session data are much lower. Timefrime is January to December October 24. My assumptions and questions so far: **Differences in measurement:** A user revisiting the site within a short time may still be part of the same session in GA4 (depending on session timeout settings). I understand that session default time is 30 minutes (without user interaction). *But aren't clicks counted as "one click" anyways, if users click the same website result again?* **Tracking issues and limitations:** * **Slow loading times** or **blocked JavaScript** influence when the GA4 tracking code executes: Users who click but leave the page before the GA4 tracking code executes will not be recorded as a session in GA4 Ad blockers and browser extensions which, when acticated, won‘t allow GA4 to track user activity * **Cookie consent:** Users that do not give consent are not attributed a session. *Is that correct?* * **Page loading error or redirect**: GSC may count the click, but GA4 might not register a session * **Non-HTML content**: Clicks leading to non-HTML content (e.g., PDFs) are tracked in GSC but may not initiate a GA4 session **Wrong attribution:** Session data includes more/different data than organic search **Bot/ spam traffic:** GSC may include all clicks, even from bots or spam, unless filtered out. GA4 often filters out known bots and spam traffic, potentially leading to lower session counts. Can you confirm these assumptions or add more assumptions? Do you have specific experiences that you could share? Thanks for helping!