The rust on the 190 should be a deal breaker. Once its there it comes back again & again. I cant comment on the 95, the 190 has basically the same motor as my 250 except for the turbo. I get 30 + (based on US gallons) all the time. The front end on the 190 is not quite as good as the w124 I have. The 95 should have the 606 motor & it is a bit more modern than a 602.
Provided the price of the 95 isnt over the top I would go for it.
If it wasnt that I was after a wagon, I would have got a w202 C250D instead of the 250TD.

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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