I'm going to mostly copy my post from the Marth general thread.
So Jab 1 does 1 less damage non tipper and tip, but leads to everything. Whether you want to true combo it to jab 2, or bait an air dodge, maybe get some Utilt, or idk tipper FSMASH, grab....
Utilt is stronger tipper and non tipper, and looking at the animation, Utilt is less laggy, somewhere between 37-39 frames it seems rather than 42
All aerials probably have the same knockback. Same damage, horrible autocancel, and landing lag except Nair. Nair seems to have less landing lag when compared to Uair landing lag. There seems to be a bigger difference between the 2.
It's true, jab 2 doesn't connect after 100% even though it looks like it should (hate that). However, above 100, if you got tipper jab 1, and wait just a little bit, you can get tipper jab 2 still a true combo. But this isnt too important, you want to kill them at high percents, so just use jab 1 into something else. At low percents both jabs work perfect thats all I need
It seems you can get jab 2 earlier, like maybe input after frame 18ish instead of 20
OMG, I am loving this. Jab 1 to tipper Fsmash is DABOMB
ANOTHER Utilt change, the body hitbox (the one that does 5%), now sends them upwards. I hate that, it used to send them horizontal (off stage)
At first I thought DS had better range for the 11% hitbox but I doubt it, it's probably the same strength too, hard to tell. Possible that it's stronger.
Grab range is exactly the same
Dsmash, unfortunately is exactly the same
Uthrow is exactly the same
Ftilt is exactly the same
Dtilt is exactly the same
Fsmash, same
Usmash, same
can no longer jab lock with jab. GRRRRRR 

Can't do 2 aerials in a short hop. Like I said, aerials are the same.
Seems like dancing blade is the same.
Shield breaker seems the same
Throws seem the same. I got Fthrow to Fair to combo on Marth at 50%, that's normal I believe with no DI
Dash attack is the same
Fair still doesn't hit on frame 5 (above Marth) even though the animation still says it does