My car is an early April build date, vin 8T01C193682 and built in Metuchen
Well looks to be real close considering to example in the picture as far as sequential number and possible build date. 8T01C1975xx
Its within that range of possible being even completed on the same day though not likely, given that group of 20 some cars all in build order, we have buildsheets from in 68
I wonder where the one was built you pictured and if the location of the build made a difference on the format and style of the tag.
Unless the engines were both built at different engine plants or if there were more than one machine making the engine metal tags - or one had not been updated think things would all be the same. Does seem to go against what Kevin wrote but we learn new things all the time as we document more examples