Thinking of adding a RIII T

I am seriously thinking of adding a Tourer to my stable , currently have a 2003 Yamaha Warrior , 2005 R3 standard , 2012 Street Glide and a 2015 FJR. The question I have is , What should I be looking for when shopping for one ? What the difference in model years . For example the standard had many changes over the years . Re engineered clutch, output shaft bearing and the engine upgrade that addressed several other issues .
Thanks ,
Carl

I think the biggest difference is ABS brakes didn't start until around the 13' models.Some years came with highway pegs,around 14' or 15' they changed the handlebars for the better (imo) and also got rid of the Mickey Mouse style of mirrors.I'msure others will mention other things.

2013 R3T SE (special edition) which I have. The SE gave you abs, driving lights and highway pegs.

They left off the abs on my bike even though my build sheet and vin number says I have abs.

So be aware of Discrepancies.