They're as different as crimson and blue, as distinct as Cambridge and New Haven. And when it comes to coaching football. Harvard's Joe Restic and yale's Carm Cozza are as different as-well, Jone Restic and Carm Cozza.

Together, they've been at the helms of their respective programs longer than the other six IVY League football coaches combined, and between Cozza's 20 yaers in New Haven and Resue's 14 seasons in Cambridge, they've won 201 games.

But their paths to success seldom cross where Cozza position as the 13th most successful active college coach-on consistency, the Crimson mentor has relied on a dynamic, exciting offense. There his baby, the Multiflex, has bcome Harvard's trademark.

Incorporating "multiplicity and flexibility," in its inventor's words, the Multiflex has delighted watcher" and stymied opponents of Harvard to ball for years.

Using half-a-dozen basis sets and their infinite variations, the Restic offense changes every week depending on the opponent-that's the multiplicity-and makes use of such hocus-pocus as backs and ends in motion before the snap-that's the flexibility.

Best-known formations include the quarter-back-in-motion set where the snap goes to the fillback, and the crowd-pleasing no-back alignment, Correctly executed, the Multiflex leaves its victims guessing even as they retreat down the field.

"It looks intricate, it looks comlicated." Restic acknowledges, adding. "I think for the people that play it, it's exciting."

And exciting's just not the first word that comes to mind about yale football. "I think Coach Restic is more of a wide-open offensive Coach." Cozza-coached squads-nine of which have copped IVY titles.

"There's some set of techniques," adds the current Harvard assistant professor of History. "That's the way to coach."

Butnot if you're Joe Restic.

If you're Joe Rastic, they way to coach ir to take your oppoents's two most important qualities-movment and aggressiveness-and take one of them, away.

"The most frustrating thing that can happen is that you perpare for a game all week and no saturday, you see stuff you didn't expect." Says the villanova graduate. "And your kids are in a state of shock-they're disoriented."

And, presumably, less aggressive "All of a sudden." Restic says of the razzle-dazzle, make their heads spin system that's brought this year's Crimson to $ 3 million overall, 54 IVY. "it's Crimson negated all that strength that you had.

Cozza's squads have been known for and wide for the strength they-have-or had. Until a couple of years ago. But yale suffered through its worst season ever, a 1-9 campagin, in 1983. The year before, the Bulldogs went 4-6.

And after this year's season opening 27-14 loss to Brown. Lee says of Cozza. "it was just eating him up-it was so frustrating."