Considering to get a new naked bike, maybe a Street triple RS or aSuzuki GSX-S750
Are there any changes from the 2017 and the 2018?
I can get a new 2017 for discount.
How is this bike for someone that is 6 feet tall? 184 centimeters?
Only thing I prefer on Lower specs models are the traditional mounted mirrors but I guess one can buy they separate.
The Suzuki seems to be more suited for shorter riders, dont wanna feel and look like a Circus bear.
Should I get the RS?
I would (get the RS), I did.
I do not believe there is any difference between the 2017 and 2018. But this is based on researching parts and perusing the "pay-as-you-go" service manual from the tritun.net Triumph site. Others can correct me, but it seems that during this past year the 2017 was released outside the US while we here in the states got the 2018...the bikes being the same. Again, someone please correct me if I'm wrong here. The dealer would know, I would hope.
Interesting cross-shop selections. I am 6 feet and 180 lbs, and I am very comfortable on the RS. I certainly don't feel too big for the frame. Sounds like you are getting a very good deal on the Triumph if you're comparing these two machines as typically the RS is considerably more expensive than the Suzuki. As Cyclone85 mentioned, the overall RS/R package is superior to the GSX-S and the cost difference shows that disparity.
For my money, if I'm getting that good of a deal on an RS where the prices aren't that different between the Triumph and Suzuki (this may not be the case for you, just surmising), I would pull the trigger on the Triumph every time. That being said, I love my SV and though it cost me nearly half of what my RS did, it is certainly not "half" the bike. There are so many great choices out there today.
Best of luck whatever you decide and do let us know.