Me too and Stfour also also thought that this is not possible, but megazig said that they should work at same time since:
On real Nand the Mios is patched BC is intact
On Sneek only BC is patched
I see that we can also have several sneek nands with different DML or Quadforce 000000008.app versions to increase compatibility
I only tested rev80 of sneek2o successfully older rev. with or with no DI couldn't see the DiscEx games on USB
I tested successfully quadforce 000000008.app with Mario GP1
and DML 1.5 0000000008.app with Animal crossing
Edit: I did the test again with DML 1.5 on real nand and Quadforce on Sneek2o nand and both Animal crossing and Mario GP worked flawlessly
