I've been asked to list the differences between the rules sets. Here are the obvious ones. I feel that this list covers any and all vital differences you might run into in your games. I'm sure astute rules readers will spot others, but this should do the trick.

Scale: The figure scale in AW is 1-figure equals 60-120 men or animals. In MW, this is 40-80.

Troop Types: In AW, there is one less cavalry category than in MW (MW has the Full Plate troop type not found in AW). AW, however, does have three types of chariots, not found in MW. Light Chariots, which move and react as SC, Medium chariots, counting as a strength of three stand, and Heavy chariots, counting as a strength of four stand. These are important troop types, but are limited to AW.

Weaponry: Pike in AW fight 4 ranks deep and Long Spear fights three ranks deep. In MW, pike is 3 ranks and LSp is 2 1/2 ranks. MW also has Halberds and Handguns as well as Gunpowder Artillery, not found in AW.

Pilum are found in AW but not in MW.

Generals: Generals in AW have five different leadership ratings with a better order giving ability than in MW, which has only four ratings, at a slightly worse ability.

Ancient Warfare also has an explanatory section on Attaching or Detaching Generals, not found in MW.

Priests: These are an integral part of AW, while they are an option in MW.

Special Formations: These are very different in each rules set. In MW, you have Shieldwall and Schiltron. Schiltron is the same as Squares in AW. Shieldwall, while similar to AW's Locked Shields, is different in that Locked shields drift 1" to the right each turn they move. Shieldwalls may not charge or countercharge while units in Locked Shields may, though not in a frenzied state and at only 1/2 speed!

Testudo is limited to AW and is available to Roman infantry only.

Swiss Square is limited to Swiss close order foot in MW only.

Conrois and Crusader Order are used in MW only.

Echeloned Line, Chariot Circles, Chariot Transports/Charges and Escort Infantry are only used in AW.

Wedge is more effective in MW than in AW, giving you two ranks vrs. 1 1/2 ranks fighting.

Morale Tests: In MW, morale tests must be taken for being charged by a heavier armor class, as well as Breakthrough chargers. These are not tested for in AW (there is no Breakthrough Charge in AW and armor class did not have the psychological ramifications as it did in the Medieval period). In AW, however, there is a test for being charged by scythed chariots, not in MW.

In addition, the morale tables have a couple of different items, having to do with special formations or weaponry, from AW to MW.

Missile Fire: Weaponry varies from rules set to rules set. Gunpowder weapons in MW are not found in AW, so special allowance and rules are made for them.

Supply units, Missile Support Fire and Double Defend orders are an integral part of AW while only an optional rule in MW.

Arrow Barrages for archers are used in MW but not in AW.

When firing, mounted bows have a lesser range in AW than in MW (non-composite bows).

Ranges vary some in both rules sets for missile fire.

There is no Heavy or Light artillery in AW as there is in MW.

Longbow is more effective in MW than in AW, with a firing modifier vrs. non-SC not found in AW.

The shooting modifiers vary because of different armor or special formations.

Close Combat: Armor classes are different, with MW having one better armor class, Full Plate, than AW (the highest armor class is Cataphract, equivalent to Armored Cavalry in MW).

Chariots are not in MW, but make up armor types in AW.

Weaponry is different, with different factors and ranks allowed to fight.

Axes count as a +3 factor in MW and 1 1/2 ranks can fight. In AW, they only have a factor of 2 and fight with front rank only.

Pike and Long Spear ranks have already been addressed.

Frenzied mounted are a +3 in MW, but are +2 in AW.

Scythed Heavy Chariot has a +2 factor in AW, but is not in MW.

Elephant and Scythed Chariot routs differ in AW, as they are much more random and unpredictable.

Optional Rules: These vary with MW having Uncontrolled Mounted Charge and the Mounted Break though move not found in AW.