I've been doing some research on the Hylian Shield VS Perfect Shielding, here's my findings.
Part 1: Smaller projectiles
(Gfy:
http://gfycat.com/AmbitiousGreedyBear )
• So it turns out, Perfect Shielding smaller projectiles gives the method an advantage seeing as how the Hylian Shield has to go through a minimum amount of hitstun.
• As for those curious about Perfect Hylian Shield, it's simply a small quirk I've stumbled on, it has literally no benefits on top of a normal Hylian Shield. To perform it,
simply auto-block a projectile following up after a normal Perfect Shield.
Part 2: Bigger projectiles
(Gfy:
http://gfycat.com/SimilarCapitalAmericanquarterhorse )
• As expected, the minimum hitstun the Hylian Shield experiences is smaller than the Perfect Shield, thus giving it an edge on charged shots and bigger hits in general. This should mean the stronger the projectile, the more of an advantage the Hylian Shield should have
Part 3: Shield Breakers
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• Except it doesn't.. it seems after a certain point, Perfect Shield has the upperhand again, which in some perspective should make sense. If not perfectly timed, the consequences are dire and extremely punishing for Shield use, where as using the Hylian Shield is MUCH more easier to perform for only an extremely small trade of added stun. Take this as you will. Truly Link's Hylian Shield is unbreakable like the real thing. (outside those few projectiles with piercing properties)
I'll double check this stuff later, maybe get some frame data on it, but what I'd be interested to know is if Link is still able to walk/dash sooner after a hylian shield block as opposed to a perfect shield block even in the two scenarios where perfect shield let's you jab sooner.
Edit: Well it's 'later'. Let's seen then.
For starters I'm not a fan of using MM's pellets for testing purposes because the amount of damage they do changes depending on how far away you are. I'll use the very tip of the attack to make sure the results are accurate.
MM's Jab 1 pellet at full range, 2%:
Perfect Shield gives you frame 1 of Link's Jab on frame 4, and it gives you frame 1 of Dash forwards on frame 11.
Hylian Shield gives you frame 1 of Link's Jab on frame 8, and it gives you frame 1 of Dash forwards on frame 8.
Ok let's try something slightly stronger. Toon's arrows are good because they do consistent damage throughout the whole flightpath.
Toon's Arrow, uncharged, 4%:
Perfect Shield, Jab starts on frame 9, Dash starts on frame 16.
Hylian Shield, Jab starts on frame 9, Dash starts on frame 9.
Luigi has an early and late hitbox on his fireball, but I'll be using the earlier one.
Luigi's Fireball, early, 6%.
Perfect Shield, Jab starts on frame 11, Dash starts on frame 18.
Hylian Shield, Jab starts on frame 10, Dash starts on frame 10.
That's kind of a weird jump from 2% to 4% am I right?
Out of curiosity I'll quickly test Pit's arrows, which apparently do 3.27% with no charge.
Power Shield, Jab starts on frame 9.... what?
Hylian Shield, Jab starts on frame 8.
You know, I'm thinking that there's just something weird going on with MM's Jab pellets. They don't follow the rules. To prove this I'll try one more test.
Sheik's single needle at max range. It does slightly more than 1%, say, roughly 1.25%.
Power Shield, Jab starts on frame 7, add 7 for dash
Hylian Shield, Jab starts on frame 8, same as dash.
This is pretty much what I expected. MM's pellets are just weird apparently in that they must have a special modifier that makes them do less stun to (regular) shields.
And anything beyond e.g. a fully charged Samus shot doesn't matter so I'm not bothering to test multiply reflected stuff because who cares? What mattered to me was at what point the powershield was better than the Hylian shield, and I believe I found my answer.