Bailador is based on Perl 5's Dancer which is based on Sinatra (Ruby).
(bailador is spanish for dancer)
Cro on the other hand was designed specifically around the features
that are in Perl 6.
This can make things more intuitive for someone proficient in Perl 6.
It might also make it easier to
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I've only done some very basic stuff with both Cro and Bailador. From
what I can tell, Cro requires less code to get something going in, but
Bailador is easier to get a regular MVC model working in.
Have you read through the Cro SPA tutorial?