Think of "-eg" being a bigger degree of something. "Very, greatly, really, hugely, etc."
"-et" is the opposite, so smaller degree "tiny, little, itsy bitsy, ect."
(The English beautiful tends to overlap pretty and gorgeous depending on inflection of the voice and the user's definitions)
Right. -eg- is like the next category of thing, and -et- is the next category in the opposite direction.
- dometo (cottage) - domo (house) - domego (mansion)
- urbeto (town) - urbo (city) - urbego (metropolis)
It works for verbs too.
- rideti (smile) - ridi (laugh) - ridegi (guffaw)
- kureti (jog, walk briskly) - kuri (to run) - kuregi (to go all out)