I noticed that every new subway car that has came in after the R142s have Kawasaki built trucks like on the R142A, R143, R160, R188 like this (wouldn't be surprised if the R179s had the same)
But the R142s are the only ones with the Bombardier made trucks like this
I just wonder what do the Kawasaki trucks have that the Bombardiers don't that they are more preferred?