LGT fronts are 316 x 20
I am pretty sure the RS fronts are 276 x 24 - same thickness as WRX - just smaller diameter
Early RS have a different rear pad - same as 2G DSM rear
WRX 4 pots = D460 which must be the same as the newer D number
There may be a few more in there - 2000 Legacy has been incorrect before.
Otherwise - good info!