Here are some threads about them:

General DC5R vs. DC5S:
http://www.ozhonda.com/forum/showthread.php?t=82663
http://www.ozhonda.com/forum/showthread.php?t=57043
http://www.ozhonda.com/forum/showthr...ight=DC5R+DC5S
http://www.ozhonda.com/forum/showthr...ight=DC5R+DC5S
http://www.ozhonda.com/forum/showthr...ight=DC5R+DC5S
http://www.ozhonda.com/forum/showthr...ight=DC5R+DC5S
http://www.ozhonda.com/forum/showthr...ight=DC5R+DC5S

LSD (DC5R) vs. No LSD (DC5S)
http://www.ozhonda.com/forum/showthr...ight=DC5R+DC5S

2nd Gear Problem on DC5R
http://www.ozhonda.com/forum/showthr...ight=DC5R+DC5S

3rd Gear Problem on DC5S
http://www.ozhonda.com/forum/showthr...ight=DC5R+DC5S

K20A2 (DC5R) vs. K20Z1 (DC5S):
http://www.ozhonda.com/forum/showthr...ight=DC5R+DC5S
http://www.ozhonda.com/forum/showthr...ight=DC5R+DC5S
http://www.ozhonda.com/forum/showthr...ight=DC5R+DC5S

DC5S Build:
http://www.ozhonda.com/forum/showthr...ight=DC5R+DC5S

As above. Please search. Theres alot of info already regarding this topic.