There is not much diference, except the cell cassete loader which is automatic on the 6000 series and manual on the 5000 series:
Attached is full datasheet of Spire 5000 Series stringer.
click here to download PDF (it may take a minute)
Some original Spire spare parts, such as lamps, belts, lamp glass,
springs, several valves and actuators, Allen Bradley I/O cards
and Opto's Cards.