type-r has:
1better ballanced weight distribution (not by much but still difference)
2 thicker 22mm(23mm japan) rear sway bar
3 bigger LCAs
4bigger disc breaks front and back 5 lugs
5 reinforced chasis( check out where rear swya bar mounts to the body)
6 top engine tie bar, rear tie up/low, trunk wall tiebar,
so 110lb is not a big difference
7 vtec engine is heavier than non vtec b18b