I think they're identical apart from a 0.1mm lift increase on the intake lobes for later EGR cars, hence the different part numbers in the 90-93 and 94-97 parts catalogues. The cam gears and front bolt is same, rear bolt has different number listed.
There's a difference in the tightening torque for the front cam bolt, maybe because the later cars have stiffer springs?
https://www.gcp.se/en/catalogues/mod...60-s90-v90-en/
https://www.volvoclub.org.uk/tech/da...1_94-Sec2c.pdf
__________________
MY97 940 CD LPT Super Sports Edition 2 Turbo, Midnight Purple, 175,000 miles.