I guess you are referring to the Exasol Data Replication Service.
We pretty much stopped active marketing as it had a strong overlap with the the cloud scalability feature and there were only few cases the DRS should be preferred.
Also, it would not use anything better than IMPORT/EXPORT for actual data transfer.
a bit more details would be great ? if you want to copy the entire database it might be of interest to use storage snapshots and mount them to a second instance.
if you think more along the lines of individual tables - how is IMPORT too slow or what are the impediments your´re facing ?
You might want to test if you can gain something by exporting to an SFTP-Server with a rather high number of files in parallel ( i.e. "EXPORT xyz into CSV AT MY_FTP
<about 100 addition FILE clauses>
and then lift them back into your other exa - I´d doubt that the "de-tour" over the additional server will help you much, but I was surprised in the past how fast this kind of export works. Just a thought.