T25G is slightly bigger...
T25G has a 2 bolt inlet to the compressor, T25 has a slip on type inlet to the compressor.
Both are bush bearing turbos (Non ball bearing).
AR's are different (My understanding is below!)
T25G
ex=0.64
comp=0.80
T25
ex=0.49
comp=0.48
PS did you try google?
Cheers
Wilbo
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