What is the difference between the Piano Libraries?

Piano	RRP	Plugin	Size	Type	Signals	Characteristics
Hans Zimmer Piano	£349 $399 €399	Kontakt Player (Free)	~211GB	Grand Piano	Spot A Spot B Spot C Spot D Mid A Mid B Mid C Mid D Tree Outriggers Surrounds Room Room Alt Gallery Near Gallery Far Bottle	Bright and warm, Grand Piano with a plethora of microphone options. Suitable for Orchestral scoring and Popular music.
Olafur Arnalds Composer Toolkit	£299 $299 €299	Kontakt Player (Free)	~15GB	Grand Piano (with Felt Layer)	KM84 Coles Processed Spaced	Soft and intimate, suitable for emotive film/ television scoring.  Library includes vintage Synths Patches and Warps.
Olafur Arnalds Stratus	£299 $299 €299	Kontakt Player (Free)	~15GB	Upright Pianos (x 3)	Stereo Pair	Soft and intimate textures, suitable for emotive film/ television underscoring. Library includes Ambient Synth Pads and Warps.
Hauschka Composer Toolkit	£299 $299 €299	Kontakt Player (Free)	~25GB	Treated Grand Piano	Close Mix Pedal FX Distorted Binson Echorec Modular FX	Contemporary textures, great for mixing with electronics in a neo-classical style.
Orchestral Grand Piano	£49 $49 €49	Kontakt FULL (Paid Version)	~3GB	Grand Piano	Close Tree Ambient Outrigger	Bright, Grand Piano suitable for Orchestral scoring and Popular music.
Mrs Mills Piano	£29 $29 €29	Spitfire Plugin	~4.5GB	Upright	Close Room Vintage	Full of character and nostalgic charm with a distinctly bright, metallic tone, owing to its lacquered hammers.
Cinematic Soft Piano	£29 $29 €29	Spitfire Plugin	~2GB	Upright	Close Mix Pad	A soft and intimate Piano that expands on the LABS version. Pads are also great for adding a contemporary flair to films scores.
Felt Piano	£29 $29 €29	Spitfire Plugin	~3GB	Upright	Condensor Ribbon Hammers	A soft and intimate Piano recorded in a small space for added proximity.
Firewood Piano	£29 $29 €29	Spitfire Plugin	~7.45GB	Upright	Close Mid Pad	A detailed upright piano, with a cracked bridge, creating unique resonances.
OPW	£29 $29 €29	Spitfire Plugin	~1.5GB	Upright	N/A	A characterful upright- great for contemporary film scoring and folk music. Library includes other Ambient Pads and Textures.
Soft Piano	FREE	LABS Plugin	~500mb	Upright	N/A	An intimate and emotive classic, available for free.