I also found a video from Andy Fogarty the At Home Welder @HomeWelder which explains some of the key differences.
Summary
| MIG (GMAW) | TIG (TMAW) | Speed | Faster | Slower | Ease of use | Easier | Harder | Initial Cost | Lower | Higher | Precision | Lower | Higher | Spatter | Yes | No | Gas? | Flux core wire can be used instead | Gas always needed | Post weld cleanup | Only needed with gasless | Not needed | Filler material? | Always | Optional | Thermal distortion | Higher | Lower | Cold starts | Yes | No | Typical use | Garage or workshop | Bench |

1 comments:
Additional comment from a couple of sources is:
"The wire used in MIG cools harder than in TIG welding, making it harder to hammer and dolly the weld afterwards" as the MIG weld would be more brittle/
Ref: Classic Concepts
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