Ram speed 2700 vs 3200

No. Your system will run better because you have now more memory installed. Anyway, you can test your system with si soft sandra, everest,...

Memory speed is not a significant issue. Vs most other things, it it the worst performance gain/price for the same amount of memory with higher speeds. More memory will provide more speed for you because windows can now fit more stuff into the memory and not have to access the pagefile on the hard drive as often.