techical difference between emirge and emirge_amplicon

[yxxue]

HI,
We have a project that going to reconstruct ribosome gene from meta-rna dataset. I know emirge_amplicon can handle up a few millions of reads while emirge is used for normal case, but there is no quite detailed description in your previous paper. I have some quesions about these two versions:

1. What has been changed in emirge_amplicon to make it suit for large dataset?
2. What's the difference of the performance about these two version if they are used for same dataset, except running time?

Thanks :)
Best regards