Copper Golem weathering should change sorting precision, range, and speed

Sorting systems are very user dependent, so rather than have copper golems do too little or not enough, weathering creates a flexible compromise.

Copper Golem: 

• Full Speed
• Searches 10 chests
• Sorts only by block and material

Exposed Copper Golem:

• 75% Speed
• Searches 15 chests
• Sorts by block, material, enchantment state, and differentiates named items which match exactly

Weathered Copper Golem: 

• 66% Speed
• Searches 20 chests
• Sorts by block, material, partial enchantment matches (e.g. if the chest contains a sword with Sharpness, then a golem will place any sword with Sharpness into it, even in combination with other enchantments), and differentiates named items as long as the name matches, even if the items are different

Oxidized Copper Golem:

• 50% Speed
• Searches 25 chests
• Sorts exact NBT matches only, including durability, or identically named items even if the items are different

This compromise on speed for precision allows for multilevel sorting, with lower level golems sorting items more precisely but more slowly, making them less suited to item dumping. The increase in search range allows for the increased precision to take up more chests.

Allowing exact name matches even without item match would allow things like sorting shulker boxes with different fill states, or sorting suits of armor by team for a minigame, or key items for puzzle maps, just as a few examples.

Copper golems need to fill a role in sorting which redstone can't, and I think these compromises keep them balanced but useful.