Last year I started biking again. My current ride is a quite good "Cross" bike weighting a bit more than 10kg (~22lb, didn't weight it). Currently I'm doing around 200km (~120 miles) per week mostly on roads. Now I'm wondering whether I could have benefits from getting a road bike for day-trips or such. I'm living near the Alps in a hilly area.

• Is there a notable benefit from the less weight of a road bike? (I weigh 80kg, 175lb) unless it's really step or a I pay really much for a very light bike I don't expect much benefit, but might be wrong?
• I wonder how notable road bike tires might be, I expect way less resistance. Any way to qualify that?
• A road bike handle has more ways it can be grabbed, which might be comfortable on longer times
• A road bike looks nicer :-p

Are there more important factors I should consider? I'd certainly keep my current bike for times where I have to carry luggage or want to stay off roads.

Last year I started biking again. My current ride is a quite good "cross" bike weighing a bit more than 10kg (~22lb, I didn't weigh it). Currently I'm doing around 200km (~120 mi) per week, mostly on roads. Now I'm wondering whether a road bike would be beneficial for day-trips or such. I live near the Alps in a hilly area.

• Is there a notable benefit from the lower weight of a road bike? (I weigh 80kg, 175lb) Unless it's a really step difference or a I pay a lot for a very light bike I don't expect much benefit, but might I be wrong?
• I wonder how notable road bike tires might be, I'm expecting way less resistance. Any way to qualify that?
• A road bike handlebar has more ways it can be gripped, which might be comfortable on longer rides.
• A road bike looks nicer :-p

Are there more important factors I should consider? I'd certainly keep my current bike for times where I have to carry luggage or want to stay off roads.