Yes but that is a aasimar. He has more bonuses than shapechngers. Lets brake it down (i'll use the mentioned dragon shapechanger):
Aasimar:
- +2 Wisdom, +2 Charisma
- acid, cold, electricity resistance 5
- +2 Spot, + 2 Listen
- light 1/day
- natural outsider (more of a bonus, than a penalty...)
- darkvision 60 ft'
Ryu shapechanger:
- Spirit subtype (+4 racial bonus against enchantments)
- Low light vision
- taboos (2 points less for the ryu)
- natural form (must make Fort save if shapechange is made more than 1/day)
- inability to take tech. feats and Void Use
- +2 Wisdom, -2 Charisma
- Samurai Spirit
- no shapeshifter abilities (remove them completely, or use them sparingly)
I think that the Aasimar wins this one and is indeed ECL +1, but as for as the comparison goes the ryu shapeshifter does not deserve ECL +1.