No. Not in terms of performance.Do you think that a X4500 chip (with a dual core and a big amount of ram) is better than my GeForce 3ti ?
Right now you can purchase Intel if your priorities are stability and better power management features, not performance. And if you want stability right now I'd recommend sticking with the X3100 for the time being.
Right now the ideal laptop for Linux is going to be a smaller business-style laptop with all-intel and with Linux pre-installed by the OEM. Even if you don't plan on using the pre-installed OS on it it's to your advantage to have a OEM provide Q/A and testing to Linux, otherwise it's always going to be a crapshoot to install Linux on any hardware unless you find somebody with identical hardware that has ran Linux on it before you did.
If you need performance on a laptop then Nvidia is still #1, but your going to sacrifice some basic usability.
I purchased my laptop from Dell with Ubuntu pre-installed; a Inspiron 1420n. My second choice was to go with a laptop from System76. It works well enough.
The real killer for Dell is their coupon deals. They seem to have a new deal every month and it's first-come first serve with a limited number of coupons. Just google for 'dell coupons' and you'll find deals with laptops. The coupons apply to Linux devices even though they may be a different number, slightly.. (for my laptop the 1420 is the Windows, 1420n is the Linux version) I picked up my 1300 dollar (configured price) for 900 dollars, if I remember correctly.