evasion: no, dalla FAQ
If my character gains evasion from two different
classes, does he now have improved evasion?
No. A 2nd-level rogue/2nd-level monk has evasion from
two different sources, but does not have improved evasion.
uncanny dodge: si`, dall'SRD:
Uncanny Dodge (Ex): At 2nd level, a barbarian retains his Dexterity bonus to AC (if any) even if he is caught flat-footed or struck by an invisible attacker. However, he still loses his Dexterity bonus to AC if immobilized. If a barbarian already has uncanny dodge from a different class, he automatically gains improved uncanny dodge (see below) instead.
scurovisione: mi pare di no