Generally speaking, I recommend Intel since Intel CPUs are much more powerful at the same clockspeed compared to what AMD has to offer. A current generation Haswell CPU clocked at 2.0GHz is probably equivalent to a Trinity / Richland APU running at 2.7GHz / 2.8GHz. Therefore, based on CPU processing power, an Intel Haswell laptop should last you longer before you feel the need to upgrade.
On the flip side, AMD APUs generally have the more powerful integrated graphics core (iGPU) depending on exactly which APU model you are looking at. The best AMD iGPU is the Radeon HD 8670m and the most powerful Intel iGPU is the HD 4600. According to Notebookcheck.com, they rank the Radeon HD 8670m to be just ahead of the nVidia GT 550m; ranked in...