Short answer
PLA wins for crisp display pieces, miniatures, and anything that lives on a desk indoors. PETG wins for tougher functional parts, anything exposed to heat or sun, and prints that need to flex without snapping.
Durability and impact
PLA is stiff and a little brittle. Drop a thin-walled PLA bracket onto tile and it'll likely crack at a layer line. PETG is tougher — it bends before it breaks and absorbs shock far better. For threaded inserts, hinges, brackets, or anything that gets knocked around, PETG is the safer bet.
Heat resistance
PLA softens around 55–60°C. A PLA phone stand left on a car dash in summer will warp. PETG holds shape up to ~75–80°C, so it survives sun, hot kitchens, and warm garages. If a part will sit anywhere near heat, default to PETG.
Surface finish and detail
PLA prints sharper. Crisp edges, clean overhangs, and the cleanest layer lines straight off the bed — ideal for figurines, badges, logos, and anything where you'll see the detail up close. PETG strings a little more and has a slightly glossier finish; great-looking for chunkier functional parts but less ideal for fine sculptural detail.
Printability
Both run reliably on a tuned Bambu Lab X2D at 0.12 mm. PLA is more forgiving on overhangs and bridges. PETG needs slightly higher temps, a touch more retraction tuning, and a clean bed for the first layer to bite. Day-to-day, both are easy — PLA is just the more relaxed of the two.
Which should you choose?
- Desk gadgets, organizers, light-duty parts — PLA. Crisp finish, low cost, low fuss.
- Display pieces, models, props — PLA. The detail is the point.
- Phone mounts, car interior parts, outdoor brackets — PETG. Heat won't deform it.
- Hinges, clips, mechanical assemblies — PETG. Takes flex without snapping.
- Anything food-adjacent or splash-prone — PETG. Better moisture resistance.
How Mr_3Dlab picks for your order
Every product in the shop ships in the material that suits it best — printed at 0.12 mm on a calibrated Bambu Lab X2D. For custom orders, tell me where the part will live (desk? car? kitchen?) and I'll pick the filament and finish to match.