Here is a comparison of those two CPUs. Both are dual core CPUs Passmark CPU benchmark scores:
Core i3 330M @ 2.13GHz = 1978
Core i7 620M @ 2.67GHz = 2731
You would probably notice the better performance of the 7 620M, especially when you do heavy multi-tasking multiple Word documents open, with MS Powerpoint or Excel also running.
For web browsing, you probably won't notice the difference as much.
Ok well that's good to know before I bought it. Maybe intel will come out with a more worthy chip in time. So basically I should be ok with this current 330m for the tasks listed then. No movies, games, encoding. Just basic office things.
It's good for all the basic home office stuff.
And it's actually good for home entertainment stuff as well. Music and videos without a problem. Basic card and board games won't be a problem. And it will even run some 3D games - just at low graphics settings in most cases.
Audio and video encoding - you can actually get that stuff done with the i3-330M. It would just take longer than a desktop quad core system.