Turbo differences in t2's

[Madmark]

Stripping my spare 98 2.7 tdi engine down this eve I noticed it's turbo is water cooled like most turbos. But when comparing it to my 2002 2.7 tdi that one has no water Cooling. . Now I know if you can get charge temps down you get more power and the 98 engine used to be loads quicker than my 2002. So you guys with 98 models with round head lights do you have water cooled turbos or not as wondering if this has been modded or just the usual money saving economy when we got to 2001 onwards model