Yeah, in general an eau de parfum will be a higher concentration and therefore stronger than EdT. But this will obviously vary, cheaper EdP will generally not have the sillage and longevity of a better made one.
I would use fragrantica before buying a perfume.
I would also highly recommend this one. But fragrantica will give you the notes and user rated performance and opinions. Very useful site.
What perfume do you have?
https://www.fragrantica.com/perfume/Hermes/Terre-d-Hermes-17.html