I havent played with an 888x but i can tell you the skyline is an amazing deal.
Well for me that is.
Pros:
-It runs smooth on the stock bearing
-Looks pretty sleek
-Its a smaller yoyo
-It somewhat weighted on the sides
-hubcaps(the hubcap bearings are really smooth
-it comes in a freaking sweet box that said “you have bought an awsome yoyo. your in for quite a treat”
cons:
-the hubcaps… because they are on a small yoyo, you cannot do thumb grinds even with them out as the are mounted on posts and it hurts really bad to jam a fing or thumb in there cause it is a tight squeeze
-i guess you could say the price at 120
Id go with the skyline if you dont plan on buying a new yoyo in the near future…(at least three months) with it being a tight time and all(and i dont know your position) Btw i replaced the stock with a konkave bearing. My yoyofactory bearing is sitting happily in my new breed. i was really surprised on the quality of the yoyofactory bearing. I got the half orange half blue as i like yoyos with different colors and i think its the best one to get if you dont want to spend 10 extra on the splash colors.
Well you can thumb grind but its not as easy if you have the hubcaps in… 
But id say skyline if you like a good spin in a small package 