Having 2 very similar updates like

UPDATE t SET

t.AODYD = <exp1>

FROM <table expression>

WHERE <common predicates> AND <predicate1>

UPDATE t SET

t.DAODYD = <exp2>

FROM <table expression>

WHERE <common predicates> AND <predicate2>

you logically may generalize them like this

UPDATE t SET

t.AODYD = CASE WHEN<predicate1> THEN <exp1> ELSE t.AODYD END,

t.DAODYD =CASE WHEN<predicate2> THEN <exp2> ELSE t.DAODYD END

FROM <table expression>

WHERE <common predicates> AND (<predicate1> OR <predicate2>)

But i second Grant Fritchey's warning about execution plans.