Short answer: PLA is cheaper, more detailed, and easier to finish. PETG is tougher and handles heat, water, and outdoor use better.
Side by side
| PLA | PETG | |
|---|---|---|
| Cost | Lowest | Slightly higher |
| Detail and finish | Sharper detail, easy to sand and paint | Good, but glossier and harder to paint |
| Toughness | Stiff but can snap | Bends before breaking |
| Heat | Softens around 55–60 °C (130–140 °F) | Softens around 70–80 °C (160–175 °F) |
| Outdoors | Not for long-term use | Good, though ASA is better for strong sun |
| Colours | Widest range | Wide range, including translucent |
Choose PLA for
- Decorative pieces, models, and gifts
- Prototypes where cost matters
- Parts you plan to paint
Choose PETG for
- Functional parts that get used
- Outdoor or wet environments
- Anything that might sit in a warm car
Still unsure? Find a local shop and ask which material they'd recommend for your part.