Yes and I have said that the 6 port is better. It is better at scavenging fuel due to the extra boost ports, so it to me is a more powerful kit.
However the more you add speed into your gearing the slower your bottom end will be again. With either of the kits you are going to need some clutch tuning done to get some better takeoff and help the bike stay in the powerband longer and easier.
The 14t sprocket will end up giving you more top speed oveall, it will just take longer to get there. Anything bigger than that you will need to buy a new chain and a motorcycle chain breaker to get it to the correct length.
If I was in your boat and worried about fines, which I'm not. My state can lay out some stiff penalties as well. I would grab the 6 port cyl, (tccd/dmp/power1) probably the power 1 since it is available closer to you. I would also get some stiffer springs for your clutch. Probably the blue ones in a stock-ish setup.
I would look at doing a little port work for low end gains, lots of reading to be done on that in the wiki on here.
I would also get a low range pipe. Circuit or sidebleed pipes are good for this.
I would leave the gearing alone as it will limit my top speed. With the gearing and the pipe you are going to hit a hard wall of top speed that you cant go past. Like you will be screaming at 9k RPM but only doing 30mph.
Make sure to get a range of jets as you need to go up a bit with the new kit and a new pipe. Plus a good hi-flow foam air filter will help on your carb. Do NOT get the metal mesh hi flow filter for the bing. It is garbage.