Even if he's not using fl or reason it doesn't mean you can't recreate the same sounds in them. Experienced producers make unique sounds by filtering, efx, layering, tweaking, eq, automation, etc... stuff like that takes time and experimentation to learn. For example, I tried to recreate a synth sound i liked that timbaland used.. I layered 4 synths in reason, tweaked out with about 4 efx on each layer. took a lot of time but I came out with something that sounded similar. I saved the patch and now I have a unique sound that no one has I can use and it's a beast of a synth! and I learned how along the way, you should try that with that trance producer you like.