Here are the stats of each of those items:
You see falcon greaves (Arm:10, distance fighting +3, sword fighting +3, club fighting +3, axe fighting +3, protection physical +7%, ice +7%).
It can only be wielded properly by knights and paladins of level 300 or higher.
It weighs 36.00 oz.
vs.
You see sanguine greaves (Arm:11, distance fighting +4, holy magic level +1, protection physical +7%, energy +9%).
Augments: (Avatar of Light -> -900s cooldown, Divine Caldera -> 8% critical extra damage).
It can only be wielded properly by paladins of level 500 or higher.
It weighs 32.00 oz.
The difference when upgrading from falcon greaves to sanguine greaves is thus:
- Arm+1
- distance fighting +1
- holy magic level +1
- protection ice -7%
- protection energy +9%
- Avatar of Light -900s cooldown
- Divine Caldera: +8% critical extra damage
- -4.00 oz. weight