Another banger from Igor: https://www.youtube.com/watch?v=U-aTEslkqco
tl;dw:
* Bambu PLA Tough+ is worse in every way (or at best, no better) than PLA Basic, except for impact resistance
* PLA Basic Silver has almost the same impact resistance as PLA Tough+, but costs considerably less
* Bambu's filament range is _nothing_ like colour matched
* Bambu's PLA Basic is nothing like consistent across its colours
All interesting results, and worth knowing.