Mine always smell more intense if I have them under a net or too close to each other, I think it's the fan making them bump into the trellis and each other kinda like they are rubbing themselves up, when I do no training and allow them their own space they don't really give off an odor that I can detect(I'm sure others could, but I'm kinda used to it)
If you want that fire smell and flavor grow organic. When I grew in tupur coco and house and garden nutes I hardly ever had smell to my flowers . That is only my experience though.