Discovery vs durability
TikTok is a discovery engine. A clip posted today either finds an audience quickly or doesn't. YouTube Shorts behaves more like a library: clips surface in search and in recommendations over a longer horizon, and a clip can find viewers weeks after posting.
Session behaviour
YouTube viewers tend to keep watching. If a viewer enjoys one Short, they often watch several more, and YouTube's systems read that sustained session as a quality signal. TikTok viewers scroll faster, but the sheer volume of impressions compensates.
Searchability
This is YouTube's structural edge. A clip with a clear, searchable title can accumulate views long after it was posted. Naming a clip for what someone would actually type is a genuine advantage that doesn't exist on TikTok in the same way.
Sharing
TikTok wins decisively. Sending a video to a friend is a cultural default on the platform, and shared clips convert into views.
The practical recommendation
Post to TikTok first for immediate reach and sharing. Repurpose your strongest performers to YouTube Shorts with a searchable title so they keep earning views over time. The two platforms compound rather than compete.
Platform behaviour changes frequently. Treat the above as general guidance rather than a guarantee of results. What you earn depends on the views your clips receive and each program's rate — results vary, and nothing here is financial advice.