My 2005 was my first FJR after a long line of BMW's.
My bike was set up with double risers and a Russell seat. I found my 05 to be much more roomier than my current 2013. Must have been my setup since I don't read of others experiencing the same.
1st thing I noticed when I bought the 2013 was it felt more compact, when in reality the wheelbase is longer that the 1st Gen and really shouldn't but I say this because of the hyway pegs, again my seat on the 05 must have sat be back further, I did have more leg room on the 05.
2nd thing I noticed on the 2013 was the S mode, this is awesome, turbo like, front wheel yanking excitement.
3rd item I noticed was wind & heat management was much better.
4th was the creature comforts, display navigation items, cruise and heated grips.
5th was the gearing. One option I added to the 05 was the
https://www.rmsportmax.com rear drive gear, this made a much more noticeable difference on the 05 than the 2013. I would rather have my 05 gear ratios than the stock gearing on the 2013.
Transmissions on both were just as slick but the 13 does go into 1st more smoothly.
Suspension wise? the 05 was upgraded, the 13 needs an upgrade (30K miles), makes a world of difference.
Overall, I wouldn't mine having my 05 back, I really like the Galaxy Blue. The 13 is sweet and very nice but the color doesn't do much for me and it blends well with pavement.
Currently shopping for a 2016 but might spring the 2018 once I see it.
BMW's no longer interests me.