Comparing some of the boots I have in my inventory and showcasing their features as well as how effective that respective stat is.
Ranging from;
-Sprint Speed
-Crouch Speed
-Sliding
-Stamina
-Leg Protection
-Mine Delay
Silent has been omitted since it is way to self-explanatory.
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Sprint Speed:
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Second most important stat in the game.
This stat dictates your ability to retreat, strike and reach tactical locations.
+20% Crown, Fast, Light.
+10% Slide, ADMB.
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Crouch Speed:
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Merely increases the speed your crouch at.
Not all that important unless you fire while crouched often.
+35% Crown
+20% Fast
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Sliding:
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Contrary to what you may have initially though, the sliding stat only increases the amount of time spent sliding, not an increase to speed.
+0.333s (25%) Crown, Sliding.
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Stamina:
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The stat that defines how long you can holdup your max speed and how often you can slide and jump.
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+3.5s (50%) Sprint, Spy.
+2.3s (35%) Crown.
+0.6s (10%) Sliding.
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Leg-Protection:
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The defining trait of a tanky player.
This is more of a complicated stat as it decreases the damage multiplier on a players leg by an extra 20%. This essentially reduces bullet damage on these weapon classes by this much!
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Damage Reduction;
Shotgun: 30% to 50%
Pistol: 40% to 60%
SMG: 30% to 50%
AR/MG: 30% to 50%
SNR: 20% to 40%
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What makes this truly a spectacle is that it allows players, even with the default vest, tank up to 374 DMG in the leg from a sniper!
All weapon damage has been cut in half, practically.
As for pistol damage they only do 40% of its original damage.
To put its uselessness in perspective at 275HP from the Frontline Vest and getting shot in the leg from the High Power Pistol, it would take 275 / (50 * 0.4) = 13.75 (14) shots to kill you. This would be further increased with the Python Vest. Either 18 or 28 shots.
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Mine-Delay:
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Aptly put, this function increases claymore explosions delay from 0.75s to 2.0s, a 266% increase in time, just enough to get away.