That may be true but have you looked at available ram at startup on the 5800, about 40% less than the n95's and less than the n85 at startup.
Here is gsm arena view
http://www.gsmarena.com/nokia_5800_xpressmusic-review-308p8.php
Web browser is a mixed bag
The web browser of Nokia 5800 XpressMusic is about the same as on the latest S60 3rd edition devices. This is a real pity. A great browser already, it could've simply kicked butt on a touchscreen device. But not this time, folks. Apparently Nokia either lacked the time or the will, so we're left with not the best touch-optimized version of the browser we know and appreciate.
Panning is the only thing that is done by sweep gestures here, and zoom is controlled by tapping on the screen. However the three zoom steps that are controlled via taps aren't the most suitable we can think of. Those include fit to width, fit to height and a third one, which seem to have no reasonable explanation. The first two are however always assuming that you use the handset in portrait position, which gets quite annoying at times.
Nokia 5800 XpressMusic Nokia 5800 XpressMusic Nokia 5800 XpressMusic
The web browser has much room for improvement
Furthermore, even if you happen to be in portrait mode and choose the fit-to-width zoom level, the text does not automatically center onscreen. Instead you will have to align it manually, which is nonsense really.
At least the page rendering algorithm is quite good, making all the pages look as if browsed from a desktop PC. The high resolution is also a welcome bonus here, as it allows more content to fit on the screen.
Finally, the web browser has full support for both Flash and Java, which means that you can enjoy flash videos straight from your browser without having to use the mobile versions of sites like YouTube.
So, generally speaking, the first S60 touch-browser is quite a disappointment. The only advantage over previous versions is sadly not touchscreen, but display resolution. And that's seriously undermined by the not so good software implementation. We certainly hope Nokia invest enough effort to make one of the most important applications more user-friendly.