I like my racquets to feel very headlight. It’s light. By contrast I swing a Pure Aero that I just picked up at a thrift and it feels heavy. The specs are 307 and 327 respectively. I definitely prefer the lower number. I’d need to swing and get used to the higher number. Like I said, I like my racquets to feel light through the swing. Swingweight was never on my radar from a spec number until this racquet. I’d have to look up what the Mono is supposed to be but it’s definitely at or around a lower number vs the Pure Aero, the RF97, or other racquets I’ve never found to my liking. It’s odd because I’ve never had an issue with heavy racquets either. I always preferred the Prince Graphite 90 to the Wilson Classic 6.1 for the same swingweight spec. I always thought it was the open pattern but now I know. I believe it’s because I hit flat and the extra weight gives too much oomph to my shots where the lighter weight allows them to land deep and in the court.