Difference between Overly and Too

OVERLY vs TOO: NOUN

Outside: superficial; negligent; inattentive; casual.
Excessive; too much.
Superficially.
Excessively; too much; too: used independently instead of the usual over- in composition: as, not overly good; overly particular.

Over; more than enough: noting excess, and qualifying an adjective or an adverb.
Exceedingly; extremely: an intensive use.
In addition; also; furthermore; moreover.
Likewise; in like manner; in the same way.
Hence—(b ) As an adjective or an adverb, very good; very well: used absolutely.
As an adjective, superlative; extreme; utter; hence, enraptured; gushing: applied to the so-called esthetic school, their principles, etc., in allusion to their exaggerated affectation. See esthetieism, 2.
An obsolete spelling of to.
A dialectal spelling of two.
See tew.
[Too in this sense is sometimes erroneously used to qualify a verb.

Intensely, Unreasonably, Overtly, Unnecessarily, Highly, Extraordinarily, Particularly, Inordinately, Very, Exceedingly, Extremely, Terribly, Unduly, Too, Excessively

Extremely, Really, Exceedingly, Quite, Enough, Terribly, Very, Pretty, Awfully, As well, Besides, Likewise, Also, Excessively, Overly

Unrealistically, Exaggeratedly, Overtly, Unnecessarily, Highly, Extraordinarily, Particularly, Inordinately, Very, Exceedingly, Extremely, Terribly, Unduly, Too, Excessively

Not, Extremely, Really, Exceedingly, Quite, Enough, Terribly, Very, Pretty, Awfully, As well, Besides, Also, Excessively, Overly

THE PROPOSED ORDER IS OVERLY BROADThe proposed injunction order is overly broad and leaves uncertainty with respect to what regulatory actions FERC may take.
Sometimes that makes me overly cautious, other times it makes me overly calculating.
And it just got overly and overly serious, when in reality, in the moment, he was laughing as well.
Tackling the issue with research and understanding is crucial to combat overly permissive or overly aggressive attitude towards the addict.
Do you have any overly specific or overly complicated instructions that you give students?
Avoid overly verbose or overly humble language and use this document to communicate about yourself as a future colleague.
In addition, the most recent operational results can overly influence individuals, who then create overly pessimistic or optimistic forecasts.
Guests have a wide scope of clothing choices that are smart, without being overly dressy, or overly casual.
However, they found the proposed provision both overly broad and overly harsh in its outcome.
Many are either overly cautious or overly aggressive.

Osteoporosis develops when bone removal occurs too quickly, replacement occurs too slowly, or both.
Deficits that grow too large and linger too long may, however, undermine that confidence.
Viewers on other computers can then compensate to ensure that the image is not too dark or too bright.
Can an agency deny my request because it is too broad or too vague?
The planes fly in too low over Churchill Forest and are too loud.
No job is too small or too big.
At Independence, farmers were too many earning too little.
God on his side no night would get too dark, no road too muddy, and no hill too high.
No holiday is too big or too small, no destination is too near or too far.
Too slow, too picky, too timely to earn rewards.