The two Lotus stage tapes I have made were missing a lot of what you could hear back in the room. They run way too much gear on DI's, so all you get from stage is the monitors. The FOB tape I made at the Stone Church last week came out so much better. You can hear all the samples and electronics like they should have been in the mix.
If the venue is set up to make it possible, I'd suggest running fob rather than onstage. We were right in the sweet spot @ the Church and it made a world of difference.
JAson