I've been looking for a laptop that's decent for hd video editing (premiere pro/after effects cs6) and hd playback. I've found two samsung laptops with very similar specs, one has AMD A8-4500M cpu with a better integrated graphics card and one has Intel Core i5 3210M with a decent integrated graphics card. Both laptops are at the same price, which would be better for me?
The Core i5 3210M has only 2 cores, with Hyper-Threading, making it 4 threads, but only 2 physical cores.
Based on this information the A8-4500M is better for video editing as it has 4 physical cores. Video editing and rendering are tasks very demanding on CPU, and the number of physical cores will make a lot of difference, mean 4 physical cores is much better than 2 physical cores.
However after I read read your post, I have searched it, and I found out that AMD might be not telling the true about the number of physical cores in its AMD A8-4500M -- some people say/believe it has just 2 physical cores.
If AMD is not telling the true, then you can always return or refuse a product you buy based on an information which is not true. If you are not sure, then you can just cancel your order, saying that you took it based on an information AMD provided that in fact is not correct.
The i5-2410M used for comparison is quite similar to the i5 3210M. The 'Gateway' APU is the A8-3500M (Llano) w/Radeon HD 6620G & DDR1333. A mobile Trinity APU will likely perform comparably and better with much greater power efficiency.
The Trinity SIMD engine is essentially the same as Llano excepting it has fewer cores but a much higher clock rate.