NVIDIA GeForce Go 6150 vs. ATI RADEON Xpress1150 256MB HyperMemory?

The first is on a compaq V6000Z with 1G RAM and an AMD Turion 64 X2 Dual-Core TL-56. The second on a dell 1501 with the same specs. I'm not a big gamer, but i do need to run programs like Maple and MatLab for school. I'd like to be able to add CATIA (a cad program) too. just wondering which would be better or if they're really all that different