Doubt regarding PBR

Hi Experts,
If the question says that for MTU size 0-100 use serial interface and for
MTU size 101-200 use fa0/0. then what is the difference between the
following commands under Route-map:-

route-map TST permit 10
match length 0 100
set interface serial0/0

OR

set ip next-hop ( remote end ip)

Just curious to know????

By the way both work as I have used them in my lab...

-- 
Warm Regards
Raghav
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