Every now and then I like to post up pics showing regularly discussed topics, this one being the difference between the three most popular US turbo blocks. The STI motor broke due to a problem with a boost controller which ended up in putting down well over 20 lbs during initial tuning.
EJ20 USDM WRX block
EJ25 USDM STI block, "#2 cylinder wall cracked"
EJ22T USDM Turbo Legacy block, "with added brass rings for head gasket strength"
personally this reconfirms my like of the 22T block.
EJ20 USDM WRX block

EJ25 USDM STI block, "#2 cylinder wall cracked"

EJ22T USDM Turbo Legacy block, "with added brass rings for head gasket strength"

personally this reconfirms my like of the 22T block.