Eidos Napoli suit vs RLBL.
You really can't go wrong with either in terms of quality. If you've tried them both on, it's just a matter of which one you feel "looks better" on you.
As @yanagi said, both RLBL and Eidos are good quality, but the styles are very different.
RLBL typically has a more structured style, with stronger shoulders and a lower buttoning point, and the jackets usually have two buttons. Eidos typically has a softer style, with less structured shoulders, a higher buttoning point, and the jackets often have three buttons.
It really comes down to which one fits you best, and which style you prefer.
Remember - fit is paramount. If a suit doesn't fit you well, it will look bad, regardless of whether it's beautifully-made and entirely hand-stitched.