Yup, much better, and it goes hand in hand with GroovyMAME (although it can be used with other builds just as well as Soft15kHz, I highly recommend GroovyMAME).
Compatibility List:
http://mame.3feetunder.com/windows-ati-crt-emudriver/Notice the note at the bottom:
Some cards listed above have known problems with low dot clocks.
For best results, a Radeon 9250 (AGP), Radeon X300-X600 (PCIe),
or Radeon HD 4xxx (PCIe) card is recommended.