I had played around with my spreadsheet a while ago compareing 99 Almace to 99 Excalibur, after seeing this post I decided to pick it up again and post my resluts.
I used these gear sets
Hands are Crit damage +3%, Sword skill +4. Feet are STR +4 Attack+4. Legs are Crit rate +3%, accuracy +5
these are not the ideal gearsets but they are what i have.
There is no ODD or occasional 2.5% damage in these results btw as im not sure the proc %, also there is no enlight
Vs Fodder no buffs:
Melee DPS- Almace: 51.953 Excal: 54.279
WS damage- Almace: 1573 Excal: 1648
Total DPS- Almace: 93.322 Excal: 99.331
Vs Fodder with berserk:
Melee DPS- Almace: 63.768 Excal: 66.839
WS damage- Almace: 1862 Excal: 2146
Total DPS- Almace: 112.616 Excal: 125.742
Vs Fodder with berserk & Red Curry bun:
Melee DPS- Almace: 71.162 Excal: 70.284
WS damage- Almace: 1978 Excal: 2578
Total DPS- Almace: 122.851 Excal: 141.632
Vs Dynamis DC no buffs:
Melee DPS- Almace: 51.284 Excal: 53.509
WS damage- Almace: 1533 Excal: 1597
Total DPS- Almace: 91.561 Excal: 97.126
Vs Dynamis DC berserk:
Melee DPS- Almace: 62.836 Excal: 65.784
WS damage- Almace: 1812 Excal: 2080
Total DPS- Almace: 110.326 Excal: 122.821
Vs Dynamis DC berserk & RCB:
Melee DPS- Almace: 73.377 Excal: 71.456
WS damage- Almace: 1978 Excal: 2578
Total DPS- Almace: 123.998 Excal: 142.735
Vs Bukhis (but not in abyssea) with only aggressor:
Melee DPS- Almace: 34.524 Excal: 35.795
WS damage- Almace: 1191 Excal: 1081
Total DPS- Almace: 66.125 Excal: 65.352
Vs Bukhis (but not in abyssea) with berserk:
Melee DPS- Almace: 42.824 Excal: 44.641
WS damage- Almace: 1406 Excal: 1446
Total DPS- Almace: 80.001 Excal: 84.362
Vs Bukhis (but not in abyssea) with berserk & RCB:
Melee DPS- Almace: 52.562 Excal: 54.375
WS damage- Almace: 1628 Excal: 1808
Total DPS- Almace: 95.439 Excal: 104.122
Vs Pil with aggressor and stalwarts:
Melee DPS- Almace: 28.460 Excal: 30.263
WS damage- Almace: 1044 Excal: 878
Total DPS- Almace: 56.264 Excal: 54.207
Vs Pil with aggressor, stalwarts and berserk:
Melee DPS- Almace: 36.648 Excal: 38.994
WS damage- Almace: 1257 Excal: 1242
Total DPS- Almace: 69.963 Excal: 73.006
Vs Pil with aggressor, stalwarts, berserk & RCB:
Melee DPS- Almace: 46.174 Excal: 47.717
WS damage- Almace: 1486 Excal: 1600
Total DPS- Almace: 85.424 Excal: 91.764
Vs Qilin with aggressor and stalwarts:
Melee DPS- Almace: 27.479 Excal: 29.865
WS damage- Almace: 1039 Excal: 875
Total DPS- Almace: 55.179 Excal: 53.279
Vs Qilin with aggressor, stalwarts and berserk:
Melee DPS- Almace: 35.555 Excal: 38.481
WS damage- Almace: 1250 Excal: 1237
Total DPS- Almace: 68.739 Excal: 72.436
Vs Qilin with aggressor, stalwarts, berserk & RCB:
Melee DPS- Almace: 44.344 Excal: 46.439
WS damage- Almace: 1477 Excal: 1581
Total DPS- Almace: 83.420 Excal: 90.052
So it seems the more attack buffs you have the more excalibur with rquiescat becomes better than almace.
If anyone would like to look over my speadsheet i have uploaded it
http://wikisend.com/download/344064/PLD%20almace%20vs%20excal%2099.xls