I confirmed what kills sooner in brawl, no di:
Tipper fair
Tipper nair
Sour shield breaker
Dancing blade (all 3, barely so maybe not)
First hit of dsmash
Sour uptilt (tipper uptilt in brawl is as strong as tipper uptilt in smash 4, non tipper uptilt is actually stronger than tipper in brawl, and that 10 damage hit on the backend (brawl) rivals upsmash!
Up B
What kills earlier in smash 4:
Tipper ftilt
Tipper shield breaker
Counter
Maybe tipper fsmash, didn't confirm, but don't forget about rage, so it may seem stronger
Maybe sour upsmash
Second hit of dsmash
Tipper upsmash, sooo strong
Up throw, every throw actually
Dash attack
What kills about the same:
Up air
Back air
Sour Fsmash
Dair
"Jab"
Dtilt
Tipper uptilt
So he isn't weaker. Now we'll look at range:
Less than Brawl:
Fsmash
Maybe grab
Up B, wayyyyyyy less
More than Brawl:
Fair
nair
bair
uair
dair (in front of marth)
ftilt
uptilt
upsmash, including foot hitbox
dancing blade
jab
shield breaker
Dash attack
Air upB may go higher
Double jump
About the same:
Jump
Probably counter
Down smash
Down tilt
Vertical Fsmash
His range is generally better. He runs faster, falls faster, but is less aerially mobile. He isn't weaker.
But most of his moves come out later and/or have less autocancel, more landing lag, more ending lag. Brawl Marth can do more aerials in a hop or short hop because he floats more, not only the speed changes. Also Brawl Marth has so little ending lag after fair, nair, and uair, I can barely tell if it autocancels.
In Smash 4, his up B can't punish OoS or kill consistently with how weak it is and short horizontal range, especially since shields get pushed back easier and with more shield stun. But it works from time to time. But, as we know, Up B has less landing lag!!
I'm sure many of you knew all this, as did I, but I wanted to test it. So here I compiled the non mathematical differences using Battlefield platforms and Link. Incase there are inconsistencies, I tried to keep it less specific than it could've been.
Last notes: I had Brawl and Smash 4 on at the same time, switching between them. But then I played Brawl for a while and when I went back to Smash 4 I noticed immedietely the game speed. It felt like Melee for a second. Marth fell fast, ran fast, and just felt good if that makes sense. It's like a false sense of "faster character than Brawl version."
The end, thanks for reading.
Okay, correction and more information time. Hyrule Temple is way better for measuring kill power and marking range game to game.
What kills sooner in brawl:
Tipper Fair
Tipper Nair
Tipper Bair
Sour shield breaker
Dancing blade (all 3, barely)
First hit of dsmash
Sour uptilt (tipper uptilt in brawl is as strong as tipper uptilt in smash 4, non tipper uptilt is actually stronger than tipper in brawl, and that 10 damage hit on the backend (brawl) rivals upsmash!
Up B
What kills earlier in Smash 4:
Tipper Ftilt
Tipper Shield breaker
Counter
Tipper Fsmash
for sure now
Tipper Upsmash, sour Upsmash, everything Upsmash is stronger than
everything Brawl Upsmash
Second hit of Dsmash
Up throw, every throw actually
What kills about the same:
Dash attack
Up air
Sour Fsmash
Dair (pretty much), two different moves though
"Jab"
Dtilt
Tipper Uptilt
Now we'll look at range.
Less range than Brawl:
Fsmash
(barely)
Grab, way less (relatively speaking)
Up B, also way less
More range than Brawl:
Nair
Dair (in front of Marth)
Ftilt
Upsmash,
ONLY foot hitbox
Uptilt
(horizontal)
Dancing blade
Jab
Dash attack
Double jump
Aerial shield breaker
Counter
About the same:
Bair
Uair
Uptilt (vertical)
Upsmash (vertical)
1st Jump
Dsmash
Dtilt
Fsmash (vertical)
Dair (behind Marth)
Shield breaker (ground, only because of Brawl forward step)
Up B (vertical, from ground and aerial)
So yes, from where I measured each, tipper Fsmash in Smash 4 kills 7% earlier (55, 62) (non tipper 1% earlier, doesn't count), and Bair in Brawl kills 9 or 10% early than smash 4 (like 136 or 7 vs 146%).
Tipper Upair kills at the exact same percent, non tipper seems stronger but I didn't test it.
And about shield breaker, in Brawl using shield breaker sends you forward a full step, so with that, it has about the same range as Smash 4's which leaves you in your spot.
The data from other threads about Marth having all around better disjoint is 100% obvious. Marth takes a huge step forward for Fsmash in Brawl, and a small step for Smash 4, for example. But the Fsmashes are almost the same, it may look like a lot less because people are comparing it to the buffed range ftilt, uptilt (horiz.), and jab. I think people's subconscious judgements on Fsmash is what created the dagger jokes and what-not.
Unfortunately I was wrong about bair, uair, utilt, and usmash range. The last two are the only ones that have better range but ONLY horizontal. Also, it's not mentioned above but (today) at first I thought I saw Fair had better range but I kept testing and they seem about the same now.
I'm editing my quoted post just to keep everything accurate for the thread.