MPEG -2 Blu-Ray more accurate file size reading in Encore than H.264 Blu-Ray???

Hi,
I just read on Kenstone.com that if you encode a MPEG-2 Blu-Ray instead of an H.264 Blu-Ray, Encore will give you a much closer and more accurate file size reading.
Is this true?
Encore CS 5.1

EdwurdAdam wrote:
Hi,
I just read on Kenstone.com that if you encode a MPEG-2 Blu-Ray instead of an H.264 Blu-Ray, Encore will give you a much closer and more accurate file size reading.
Is this true?
Encore CS 5.1
They are all guesses anyway.
H264 will get you more on the disc, as it is a much more efficient codec. Same quality in MPEG-2 will be twice the size, roughly.

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