Neither, The very last often has some new model components. You end up not knowing what you have. When some went from OBD1 to OBD11 there was a time with OBD1 system & OBD11 sensors.
The first of the new is a no no also.
Best is about 6-12 months before the end of a model.

__________________
Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving