The only differece between Tomato and Tomato ND ("New Driver") is dirvers. The author of Tomato gives the compatible list for routers. For some new routers, one has to use TomatoND.
I see some users use both Tomato and Tomato ND on WRT54GL, so do I. But I cann't tell which one is better for you, it depends on the exactly model of your router and you can check the suitability by running "nvram get wl0_corerev" in telnet.
For more information, please check our here:
http://www.linksysinfo.org/forums/showt ... new+driverThanks,
KevinZ - NeoRouter team