t60 vs t41p (battery life)

[puloxor]

I'm considering getting a t60 (1400x1050, x1400 128mb, 9cell), but it looks like the x1400 takes up a lot of power. From the lenovo specs, compared to the integrated graphics, it takes away 1 hour from the machine. I'm also looking at the t41p as an alternative (128 fire gl card) for better battery life and s-video out.

For those of you who upgrade from a t41p, how do you find the battery life comparatively?