Whats the differnce between these two?

maybe it may only work once(cheaper one)

I'm not familiar with this site but the top row says that it's a discount for first time users. The bottom row is probably the regular price.

It's written right there lol One is an offer for new user, guessing is your case? Probably one time buy only. Other one is just the normal offer

>new user exclusive

now what could this possibly mean???

One discount is for being a new user, another is probably once per month or patch.

€ .43