Threaded and compression fittings look nearly identical, but they connect in different ways while functioning the same. You can explore differences here.
What Are Compression Socks? Types, Benefits, More
Hydraulic Fittings and Flanges
Applications and Benefits of Push to Connect Fittings - Brennan
Hose Clamp Types
Pneumatics vs Hydraulics
Comparison between OPC and PPC.
The Basics of Compression Fittings - Beswick Engineering
Compression Fitting Types and Applications - Rubber & Specialties,Inc.
The Basics of Compression Fittings - Beswick Engineering
Compression Fittings,Manipulative Compression Fittings,Brass
Benefits of Using Plastic or Brass Fittings
PEX A vs PEX B: Pros and Cons - Williams Plumbing
Compression Fitting 101: Everything You Need to Know
Poly Alloy Vs. Brass PEX Fittings