JFrog Artifactory and JFrog Bintray both manage binaries (and any other file type you can think of). I'd like to see them as two different parts of your CI/CD pipeline.
Artifactory is mostly meant to be used inside the organization. For managing all binaries coming in as dependencies (like maven central jars) and being produced by your build process (like your
org/pack-docker docker image). These can later be used by others in the org or released to Bintray.
Bintray is meant to provide a universal distribution platform for your end deliverables. For example, the
pack.rpm you want to be available for your customers to download. And also that
org/pack-docker docker image.
Look into the features lists of each and see how they differ in order to best match their intended role.
I hope this helps explaining the differences.
Disclosure: I work at JFrog