Hi @Joey
They might feel similar since Torque was based on the OpenPBS codebase. OpenPBS was a version of PBS released as opensource many years back.
Post that, Altair engineering has put in a huge amount of effort towards PBS Professional and added tons of features and improvements in terms of scalability, robustness and ease of use over decades which resulted in it becoming the number one work load manager in the HPC world. Altair has now open-sourced PBS Professional.
So, pbspro is actually very different from torque in terms of capability and performance, and is actually a completely different product.
Let us know if you need further information in switching to pbspro.
Thanks and Regards,
Subhasis