about suspension & forks - cruiser is hugely different from dual sport because of several things especially length of springs, sag range, dive, compression, damping, etc. I never really understood the need for adjustable rear suspension. IMO - it's useless. My bike has one and I hardly feel any difference
Bottom Line - Suspension Travel is the most important specification to look at. Cruiser version has a much shorter length than Dual Sport because it has a small dive length which is why riders always feel a jolt whenever they go over potholes. Repeated vibrations will burn out the oil inside due to rapid compressions and that will blow out the seal. Some bikes use spring only and that spring (not rated for where you're riding on for prolonged period of time) can snap from repeated, abusive vibrations.
But!!!! that is easily upgradeable (but pricey of course). Some cruisers have very nice, expensive version and it dives gracefully especially upon braking while absorbing heavy weight. If you recall any scenes in Terminator 2 where Arnold Schwarzenegger rode a Harley and braked... its dive was graceful! I likey! That means a very very comfortable ride like a Cadillac!
Skip to 0:15 where you will see Arnold's Harley coming to stop. ain't it nice!?!?
YouTube - Terminator 2 in one minute
For dual sport - Öhlins (top of the line. expensive) is ooooohhhh yyyyyeeeeeeaaaaa
My dream goal is to get Öhlins parts for my bike but it's $$$$. It's at least $1,000 upgrade
just to give you some idea how much
Harley Sportster's suspension travel differs from BMW F650GS (Dual Sport).
Harley's Suspension Travel is 92mm (3.6") Front and
41mm (1.6") Rear.
F650GS's Suspension Travel is 180mm (7.1") Front and
170mm (6.7") Rear.
You see that both bikes differ by 5.1" in rear (most important since jolt hurts your backbone & butt the most, not your arms). This means - my bike has 6.7" Rear to spare if I hit a pothole... while Harley has only 1.6" to spare... all I can think of is... "OH MY COCCYX!!!"
Sportbike is even worse... its suspension is very tight. ugh! I really thought I broke my coccyx when I rode my friend's sportbike home