Ok,
1. Touch screen is WAY better than using R3 stick to scroll and click.

2. Yes, it does lag abit while you r engaging lots of monsters... it's still playable.

I have both version... I play on big screen while other in my house went to sleep.. I play vita ver while I m in toilet or waiting for some1 in the car... lol
Both version can transfer save file to each other vice-versa. 

well most of the time you using the cursor for the rune or clicking 'shining' things on screen,
or sometime's using it for 'harrassing' the character on screen. I reckon it works wonder on touchscreen
but still good on analog.
so you got a copy both for ps3 & vita? if you ever need any extra 'muscle' on ps3 please hit me up.

Happy side scrolling 

No online pass for vita version, just go to portal/stable, the game will ask you whether to go online or not.
But you need to finish the 9 dungeons story 1st.

my MUSCLE is ready     

i believe so, You get an item called Amnesia Potion on floors 3, 6, 9, 18, and so on of the Chaos Labyrinth which allows you to refund your skill points

Once you complete a floor that awards you an amnesia potion, you cannot repeat the floor to get another, if you want more create new character & repeat

the process.

farming gears... in Labyrinth of chaos til lvl 99. XD
Random stages and random boss, you get reward after clearing each lvl.