as far as i know, all 4G92 block are of the same quality (manufacturing wise), the difference is only regarding internal part specs such as piston, conrods, crank, etc. same goes with 4G93.
to confirm this, u just get different types of 4G92 block (or different types of 4G93 blocks) without the head and internal.... just empty blocks. weight them and compare. if they're just the same.... then it proves this concept is true, because stronger built blocks should weight heavier.
unless there is a real spec sheet that mentions the difference between these blocks (and again of course, without the internals).
to confirm this, u just get different types of 4G92 block (or different types of 4G93 blocks) without the head and internal.... just empty blocks. weight them and compare. if they're just the same.... then it proves this concept is true, because stronger built blocks should weight heavier.
unless there is a real spec sheet that mentions the difference between these blocks (and again of course, without the internals).