I believe the comparison here b/w Rudra and LCH is wrong.
Reason:
One is dedicated Attack helicopter, lighter and more agile that is LCH, if u go buy figure mentioned above you r wrong, LCH is faster and agile as its designed to attack and manover faster. Rudra is of different league, its for more of an close infantry support role or to be precise direct fire support role.
Providing cover to say air assault on a hill top with other Dhruvs and MI-17V's transporting troops and Rudra providing cover file and other such roles. same role of Bell OH-58 Kiowa.
LCH on other is Light Attack Helicopter, work in tendon with Armor and mechanized corps. Call for fire support or Tank burst role etc.
Both have their uses, both are needed, Rudra can any day carry 5-6 troops or less with it (one might say 12-14 but its wrong, equipment placed in Rudra takes up a lot of cabin space) but LCH can carry 0.