The RX 460 4GB is without a doubt better than both the GTX 750 Ti and GT 730 but i would be weary about your CPU bottlenecking it in a majority of games as it is quite old and weak to today's standards for gaming. Hope this helps
See for yourself here > https://www.techpowerup.com/gpudb/2849/radeon-rx-460. Go down to relative performance and you will see it is ~27% stronger than the 750 Ti and the 730 is way down the list haven't bothered looking for it...