Jaleo vs. Firefly
It is kind of apples-to-oranges. I've been to Firefly and also to e-by-Jose-Andres (which is part of Jaleo). Both are perfectly nice - I think I'd go to Firefly if I wanted "Comfort food" tapas and Jaleo for something more special. Bear in mind that e by JA is probably not exactly representative of Jaleo.