5450 vs 4530 mobility radeon

HD 5450 is better but i don't recommend either for smooth gaming experience

The 4530 is better. The shaders on the 5450 are optimized for DX11, but offer slightly worse performance in DX10 than those in the 4530. As such, the 4530 is faster in games, but is not really a gaming card. It's a good card for an HTPC, playing older games, and accelerating Blu-Ray, but definitely not for modern games.

Well the OP is asking about the Mobility cards,but yes i did a search and 4530 is a little faster,thanks for your info megaman  
http://www.notebookcheck.net/AMD-ATI-Mobility-Radeon-HD...
http://www.notebookcheck.net/ATI-Mobility-Radeon-HD-545...