Both are absolutely wonderful. The classical pieces by bSO are amazing. However, I must admit I prefer the sound of your mix. The Holberg Suite is simply brilliant. Did you use the mix as described in your tutorial? Using some compression, slight stero enhancement and then a final algorythmic reverb?I totally agree - as long as you only play some instruments. As sson as you play with a large orchestra it can end in a special sound.
Listen to this typical example.
I believe it is why the room IR is calculated a lot of times in each instrument so that the typical room-colour of the IR beginns to dominate the final sound more and more.
After using MIR for all your mixes over a longer time you will probably understand my "ketchup-story" above in a better way. Playing all the music through MIR lets all your music sound "MIR-like" - individual mixes would sound more interesting. Now, this does not mean not to use MIR anymore. I use for example MIRx in my mixes when I need instruments which shall sound far away. This works very fine with MIRx.
If you like here you can listen to some different VSL-examples mixed without MIR (on the right)