Neither lead came nor copper foil is inherently "best" for stained glass; the ideal choice depends on the specific project and desired aesthetics.

Lead came

Pros:

• Traditional method, creating a classic "cathedral window" look. 
• Offers excellent strength and durability, especially for larger panels. 
• Ideal for geometric patterns and designs. 
• Lead can be cemented, making it more weather-resistant. 
• Cons: Can be more challenging to work with, especially for beginners. 
• Requires more tools and a larger workspace. 
• Lead can be a health concern (lead fumes from soldering, handling). 

Copper Foil:

Pros:

•  More versatile for intricate designs and small pieces. 
• Easier to use for beginners and for creating complex shapes. 
• Allows for finer lines between glass pieces. 
• Good for 3D objects like lampshades. 

Cons:

• May not be as strong as lead came for large panels. 
• Foil can oxidize and not accept solder if left exposed for too long. 
• May need additional support or framing for larger projects. 

Mixing Techniques:

• Many artists combine both methods in a single piece to leverage the strengths of each. 
• For example, lead came can be used for straight lines and borders, while copper foil is used for intricate details and curves. 

Ultimately, the choice depends on:

• Project size and complexity:Smaller, intricate pieces often benefit from copper foil, while larger, geometric designs are often better suited for lead came. 
• Desired aesthetic:The look of lead came is distinct from the fine lines of copper foil. 
• Personal preference and skill level:Some artists find lead came easier to work with, while others prefer the flexibility of copper foil. 
• Environmental factors:Lead can be more weather-resistant when cemented, making it a good choice for outdoor installations.