Accelerometer: ADXL335 vs MMA7361LC?

has anybody experience with these two accelerometers?
I'm using the ADXL335 which has a 'sensitivity' of +-3Gs; the MMA7361LC offers a +-1,5G option.

I'm not too experienced with sensors at all, so my questions might sound foolish to experts.

Does the +-1,5G mean increased precision? I need to measure very precisely the tilt of a platform.
Is the MMA7361LC working well?

Thank you very much!