Model:
Ikea KIVIK 3-seat sofa, Hillared with chaise longue
Ikea KIVIK Two-seat sofa

In the archive in 3Ds Max 2013 files, identical objects are copied from instance. If possible, the TurboSmooth modifier is left.
In the OBJ export file, both variants of the sofa are completely without TurboSmooth.

Name: Ikea_KIVIK_2
Units: Millimeters
Polys: 1,603,196 (4 sofas using TurboSmooth)
Verts: 1,554,570 (4 sofas with TurboSmooth)
XForm: Yes
Box Trick: Yes
Render: Corona, Vray
Formats: 3Ds Max 2013, OBJ