It has a BCM6328 which is as good if not better than the BCM6358.
+1. I've just bought a Linksys X2000 to use as a spare router...it uses a Broadcom 6328 chip. I've noticed that it syncs almost a meg higher than the Billion 7800N which uses a Broadcom 6358. I'm now using the Linksys, really impressed with its wireless range and also love the feature where you can turn off the router lights. On the downside the router doesn't give you any line stats
TalkTalk Plus LLU ADSL2+ 18015/1019 kbps Pioneer Kuro 428XD ISF'd iPhone 4S 16gb ThinkPad X220
And of course build quality and feature's suffer as it's a Thompson or re branded Technicolor , as for it syncing higher than a billion 7800 n i can't say, but what i can say is that it compared to a Netgear DG834 v4 showed little or no improvement on sync ,
The only thing that it was better at was showing a lower latency whilst uploading , it still has the horrible GUI most of the advanced options are hidden away within it's CLI interface, port forwarding can be a pain .basically their routers suck because they are not designed with the users in mind, a simple thing such as changing the routers lan ip, also there are a number of security risks back doors built in so isp's can remotely manage , unless this is disabled in cli