Thanks.
LOL, what was that site? There were games for children...
Anyway, I cheked in some dictionaries and on Wikipedia before asking here, but there are several names and I'm not sure all of them are commonly used and people know them.
The first should be commonly called a "loader" or "front loader", the second a "digger" or "excavator", or "backhoe"...
But since I'm not sure...
By the way, you mentioned "earth" and "dirt". Are they synonyms? Talking about the stuff those vehicles move... I think "soil" cold be used too, but it's not so common in this context.
Thanks