Qualitatively it seems faster, but I think a more optimized ROM/kernel will provide even more improvement over the GT-N5100. I was using the X-Note ROM on my GT-N5100, and I was very happy with the speed. The SM-T325 seems a little faster, but not by leaps and bounds. I am currently using and rt Launcher on the device. The biggest improvement is in the display, and it seems like I am getting better battery life than I did with the GT-N5100 after a few charging cycles. Attached is a screenshot of my battery usage from today. I spent a lot of time on Reddit!
Thanks for the feedback. You are right, the speed improvements from device to device are in fact minimal.. it's all about the software. And 4 cores is useless.. not to mention 8 or 16 cores and I hear some Chinese phones will feature to be released soon.. these people are all out of their minds.. 2 cores running faster will give you a much faster UI experience than 4 cores or more running slower, even if the official benchmarks say otherwise. User experience and benchmarks (most of which the manufacturers fake) are different things. Samsung software and launchers are deplorable.. an aftermarket launcher and a good cleanup of all the useless system garbage will make the hardware run twice as fast and the battery last substantially longer.. my opinion is Android OS becomes bigger, fatter, slower and more complex and less "open source" with each release and the hardware can't keep up with the baggage. KitKat is bigger than Windows XP ever was and some of the apps also bigger and use more RAM than Windows apps. On a phone?? Do I find this normal? No. For me, my Galaxy Tab 7 (the original, and I still have it) running 2.3 Gingerbread, was the Golden age of Android.. from Honeycomb forward is all downhill..
The fact that my phone's CPU has more cores than my laptop, needs more RAM than my laptop and uses an OS bigger than my laptop, tells me clearly we are going the wrong way with this. I am already over Android as I have been with Windows for years. It's time something new comes up again from scratch.. simple, lean, free, open and fast.