Difference between Muster Up and Summon

MUSTER UP vs SUMMON: NOUN

To call, cite, or notify by authority to appear at a place specified, to attend in person to some public duty, or to assume a certain rank or dignity; especially, to command to appear in court: as, to summon a jury; to summon witnesses.
To call; send for; ask the presence or attendance of, literally or figuratively.
To call on to do some specified act; warn; especially, to call upon to surrender: as, to summon a fort.
To arouse; excite into action or exertion; raise: with up.
Synonyms and Invite, Convoke, etc. (see call), convene, assemble.
Cause to become available for use, either literally or figuratively

Sinewless, Good part, Unstrength, Strengthful, Fortitude, Revigorate, Strength, Innerve, Sthenic, Sthenia, Courage, Come up, Rally, Summon, Muster

Bring, Assign, Gather, Convene, Compel, Awaken, Invoke, Muster up, Come up, Rally, Call for, Cite, Marshal, Mobilize, Muster

Pluck up, Sinewless, Good part, Unstrength, Strengthful, Fortitude, Revigorate, Strength, Innerve, Sthenic, Sthenia, Courage, Come up, Rally, Summon

Find, Call, Bring, Assign, Gather, Convene, Compel, Awaken, Invoke, Muster up, Come up, Rally, Call for, Cite, Marshal

How do we muster up the courage to turn down new invitations while still keeping friends close?
Congressmen can muster up against the war in Iraq is tosay let Congress vote on it.
But can they muster up some points on offense against the very stingy Steeler defense?.
Maybe he could even muster up the courage to explain his feelings by then.
Tom Hanks was able to muster up a handful of anecdotes for print.
But TODAY all Old John could muster up was attacks on Obama.
He used pathos to muster up superior performances from ordinary citizen soldiers.
Bill right and muster up strength for him.
You better muster up some will to fight.
Can we pull ourselves together, muster up our civic pride, collective chins up, and move forward?.

Summon Doomguard and Summon Infernal have had their damage coefficients increased.
Summon a High Rarity S Monster with Super Ally Point Summon!
How to summon custom mobs with the Summon Command generator.
Summon Dire Wolf Summon Grizzly Spirit Wolves are very helpful, and make for valuable minions until you qualify for Summon Dire Wolf.
Raise Spectre, Raise Zombie, Summon Skeletons, Summon Raging Spirit, Summon Carrion Golem.
Agreeable to summon urdu meaning of summon in but muslims can listen to summon?
The most infamous combo with Ptolemaeus, summon this bad boy out, use its effect to summon Nova and then Summon Infinity immediately.
Removed spells: Dig, Summon Scorpions, Song of Shielding, Polymorph, Ice Storm, Demonic Horde, Summon Ugly Thing, Summon Dragon, Mass Abjuration.
Normal Summon Junk Synchron, Special Summon Psychic Tracker and Synchro Summon HTS Psyhemuth or Powered Inzektron.
Aura of Abjuration, Recall, Summon Forest, Shadow Creatures, Summon Demon and Summon Mana Viper.