Tamron 18 300mm f 3 5 6 3 vs fujifilm 70 300mm f 4 5 6?

Here is what the site says about that.

From Tamron 70-300mm f/4.5-6.3 Di III RXD: Tamron 70-300mm f/4.5-6.3 Di III RXD: A zoom lens by Tamron for Full frame cameras, 70-300mm f/4.5-6.3. A light, inexpensive telephoto zoom that relies on in-body stabilisation.

From Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD: Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD: A zoom lens by Tamron for APS-C cameras, 18-300mm f/3.5-6.3. One lens from wide angle to 450mm equivalent (480mm on Canon): an APS-C travel zoom.

Quoted from this site's pages.