This is a common request that we have not found a good solution for. Sometimes people will ask for an export that “perfectly matches the encoding of the source clip” or has the same GOP structure or bitrate. Unfortunately, there is so much variability among the various encoders out there that we do not have a good way to duplicate the encoding decisions that another encoder made.
One thing we do offer that might be of interest are the Custom Export Presets. If you spend some time finding a set of export parameters that you really like, you can save them as a preset so you can easily recall them later.