All modern engines use version 3.5 , but there are different point releases between CF and Railo. The latest version of CF beta comes with version 4.1 .
ColdFusion 11 BETA uses 4.1.10-Final
ColdFusion 10 uses 3.5.2-Final (checked on u11)
ColdFusion 9 uses 3.5.2-Final (checked on 9,0,1,274733)
Railo 4.x uses 3.5.5-Final ( 4.0.4.001, 4.1.0.011, 4.1.2.005, 4.2.0.000)
Railo 3.x 3.5.5-Final ( 3.3.4.003, 3.3.3.001, 3.3.2.005)
. Hibernate, 4.3.1
CF Railo Hibernate HTML 3.5.
Hibernate : http://docs.jboss.org/hibernate/core/