A terpene is a terpene, regardless of the source. The more important question to ask is, what is the level of purity of the terpenes and terpenoids used--are they oxidized and degraded or are they 99.99% pure?
Terpenes and terpenoids are not unique to cannabis. They are in every single natural product in the world and have been around since the earth first existed. There are over 30,000+ known terpenes and terpenoids in the world, and only about 200 have ever been identified in cannabis. All have different chemical structures, molecular weight, functional groups, and boiling points - these are just 4 factors involved in extraction. How can you possibly extract 300+ compounds all with different factors without chemically modifying any? You can't. That's why chemical supply companies (that have been extracting and isolating terps for 100+ years) use the most efficient methods: ie. extract/isolate linalool from cilantro where its found in up to 30% in concentration. GDP, dominant in linalool, can be found with max ~1-4% linalool in the cannabis flower. From 30%-99.99% or 1% to 99.99% - which is more economical?