The sixth generation came with updated internals, new colours, the removal of the iPod Touch Loop wrist strap.

iPod touch (6th Gen)

iPod touch (6th Gen)
Release Year 2015
Capacity 16, 32, 64, 128 GB
Apple Order No. MKH42LL/A
Model Number A1574 (EMC 2899)
Actual Capacity 16 GB - Grey 16 GB - Pink