Noctua NF-A20 PWM vs NF-A9x14 Case Fan Comparison

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Noctua NF-A20 PWM	Noctua NF-A9x14
Prices (Change region) In Stock $35.95 Last updated 44 minutes ago. In Stock + $10.74 Shipping $35.95	Prices (Change region) In Stock $18.95 Last updated 44 minutes ago. In Stock + $7.12 Shipping $18.95 In Stock Free shipping $28.61
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Brand noctua	Brand noctua
Model NF-A20 PWM	Model NF-A9x14
Release Date 📅 November 2017	Release Date 📅 January 2014
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews Add a product review	User reviews Add a product review
Price history View Details ►	Price history View Details ►
Fan Size 200 mm	Fan Size 92 mm
Color Brown	Color Brown
Airflow 59.3 - 86.5 CFM	Airflow 22.4 - 29.7 CFM
Airflow Direction Regular	Airflow Direction Regular
Fan RPM 350 - 800 RPM	Fan RPM 300 - 2200 RPM
Bearing Type -	Bearing Type SSO2
Fans Quantity 1	Fans Quantity 1
LED Color None	LED Color None
PWM Connector Yes	PWM Connector Yes
Fan controller included No	Fan controller included No

What are the differences between Noctua NF-A20 PWM and NF-A9x14? Analyze head-to-head all specifications and features to find out the better case fan.