Losi 8ight 1.9 buggy/truggy general knowledge needed.

[Desert Rc]

I bought some 8ights as a lot on ebay. One buggy and one truggy. Currently I have the 8ight buggy converted with the truggy center diff installed. Does this not make the buggy gearing a bit lower with the gearing on the center diff or is it the same? I remember it being lower....i dunno for sure.

Also If I were to buy some 2.0 diffs for these rigs off flea-bay would they all mount up okay or do some fit and others need mods or just internals converted?