Do you mean it is slower compared to N64oid, or compared to the version prior to adding the GUI (or both)?
Maybe it's just my misleading imagination.

And many things have changed in the last months.
- N64oid has gotten many impovements. better speed, more accurate audio and the new graphic plugin.
- you add rice plugin
- rice performes bad on tegra, but very good on exynos
- the galaxy s2 has many problems with gles2n64, but on rice some games don't start.
- the actual version of rice fixed many things for my SGS2 ( now background and menue textes on bug's life, no flickering in bluesbrothers), but breaks other things ( no gras in conker. before it was only flickering)
at this stage, it's nearly impossible to compare the same settings on different devices.
