Please see my image
and answer the question that is at its bottom.
In short, an application is running on two Wintel computers with very similar properties, and it displays a big difference in performance. Each application essentially creates dynamically an intricate sequence of queries and eventually INSERTs something in a linked table. All linked tables (a few dozens) are identical (copy command was used) instances and are located on the same hard drive that the application itself.
I'd appreciate any ideas about why it might be the case.
Faster one is a server of our datacenter service provider, slower one is my workstation.