What is the better format to convert Blu-Ray movies to mkv or mp4 and why is one better than the other?

I want to store my Blu-Ray movies on my external hard drive and im using Aiseesoft ripper.What is the better format to convert Blu-Ray movies to mkv or mp4 and why is one better than the other?
Or you can try this tool which allows you to rip blu ray to mp4

http://www.holeesoft.com/blu-ray-ripper.鈥?/a>
I recommend you to convert your blu-ray movies to .mp4 format. It is more popular than .mkv format and it can be played by most of the video players and most of portable media players,such iPod, iPad, and PSP and so on. For the output quality, you can control it with the output settings within the Aiseesoft Blu-ray Ripper.What is the better format to convert Blu-Ray movies to mkv or mp4 and why is one better than the other?
I think you can try tipard blu-ray converter, it can convert Blu-ray disc or Blu-ray m2ts files to DivX, MP4, AVI, 3GP, MPEG, FLV, etc. and HD formats.

Then you can compare the converted file. good luck for you!What is the better format to convert Blu-Ray movies to mkv or mp4 and why is one better than the other?
I like both of them makes the only difference that I will recall is that the mkv files cannot be played with all the video player programs and mp4 is more popular.

eye makeup styles