While both factions strive for a common goal, they find themselves at odds with each other for control of the city, and the Naruu's favor.

The Scryers have the enchanting trainer - Master Enchanter and Grand Enchanter. It in fact eliminates need to visit Uldaman trainer (and yes, players of any level can be summoned to Shattrath).

Alliance players start out Friendly (0/6000) with the Aldor and Unfriendly (0/3000) with the Scryers, while horde players will start out Friendly with the Scryers, and unfriendly with the Aldor. Their quartermaster is located in Shattrath City in their own bank.

Blood Elf characters start Friendly with Scryers.

Questing (regular and RRQ turn-ins) increases reputation with Scryers and decreases reputation with Aldor. The decrease is bigger than increase (eg +250 increase and -270 decrease, resp. +25/-27.5)!

Netherstorm has own chain of quest (Area 52) mainly around Mana Forges. There is simililar line for Aldor factioners.

Shadowmoon Valley has own quests and flightpath (Sanctum of the Stars). You cannot use flightpath in Aldor base in Shadowmoon Valley of course :)

If you choose Scryers faction you cannot enter Aldor Rise in Shattrath nor any other Aldor city (like the one in Shadowmoon Valley). In Shattrath you will be attacked and teleported out of the city (cause its Sanctum). In other places you will be attacked and killed if not being able to flee.

[Arcanist Adyria] located in Shatrah City (Lower City)
- Quest [Voren'thal's Visions], 10x[Dampscale Basilisk Eye] for +500 rep (first turn).
- Repetable Quest [More Basilisk Eyes] - 8x[Dampscale Basilisk Eye] - +500 rep
Can be used to change from Aldor to Scryers!

(For Alliance it's the only possibility to start gaining reputation. Two turns will make you Neutral with Scryers and Unfriendly with Aldor at which point Arcanist Adyria does not offer any quest anymore. Go to Scryer's place, new quests will open)

[Magistrix Fyalen] (Scryers Terrace), givest at first
- [Firewing Signets]- 10x[Firewing Signet] - 250 rep, nice XP. This quests opens two other quests (repetable)
- [More Firewing Signets] 10x[Firewing Signet] - +250 rep
- [Single Firewing Signet] 1x[Firewing Signet] - +25  rep
Available only up to Honored !

Later it will offer new quest :
- [Sunfury Signets] - 10x[Sunfury Signet] - 250 rep, nice XP. Opens two RRQ:
- [More Sunfury Signets] - 10x[Sunfury Signet] - +250 rep
- [Single Sunfury Signets] - 1x[Sunfury Signet] - +25 rep

[Voren'thal the Seer] at Scryer's terrace has one quest :
- Synthesis of Power, 1x[Arcane Tome] - the reward is [Arcane Rune] which is later used for buying Scryer items. + 350 rep, it opens following RRQ:
- Arcane Tomes, 1x[Arcane Tome] - +350 rep and [Arcane Rune] as reward

See also Reputation turn-in items Guide

See Aldor and Scryers comparison as list of rewards is really long.