In moments of desperation (i.e. getting stormed and I'm one of the last men) The awp is never a disadvantage. If you need kills quick and easy use an AWP>
However, My main gun is the scout. Over m4, over ak, over all except maybe deagle. If I'm playing a server that DOES allow awps and autos, i will use a scout, I will use an awp to out-snipe other guys, and occasionally an auto ONLY ON CT just for fun. Autos are inaccurate. T auto also takes FAR too long to reload.
The good tips for the scout are obvious. To begin with, its the only sniper allowed on eGO servers.
Second, it is light and quick. You can actually run and move with it. With an AWP, you can move but you're essentially a sitting duck.
Scouts are faster overall. Reload, draw, and firing. They don't epically miss at bad times even when scoped. The fact that it takes two shots to kill on body shots doesn't matter. 1, its still 1-shot with no armour sometimes. 2, if you can still dodge and take cover, you can still kill without getting hit. You can also jump out and get an accurate shot better than with an awp.
Another ENORMOUS plus for the scout is that the double scope isn't a stupid 5000x magnification. You can aim well with either scope for the scout.
An awp has a single scope that is either far too minor, or too major, and you can't back out. the double scope makes it so you cannot get any peripheral, and it is more difficult trying to follow a person's line of movement, and is stupid. In that same point, it is much easier to aim for the head with a scout rather than just seeing part of a body and firing, so overall skill is built more too
Noscope wise, an AWP is good if you're turning corners in close-quartes, because the random shot will most likely hit somebody coming around that same corner no matter where on your screen. If you need to noscope from afar, a scout is better.
Skill-wise, it takes a better person to handle an AWP properly than a scout.
Tactical/team/realism-wise, a scout takes more overall skill, whereas an AWP you just need to be able to control the aim/shot.
Oh, and scout's don't give away your position.
I will always take a scout over an awp, with the two exceptions of zombies and jail, where power is essential.