cam belt change s4r

Hi folks,

I want to change the cam belts on my monster s4r/2006
as there are a few options to purchase, will it matter
if i choose a non OEM belt, as far as i understand it
the two belts are the same, also is there anything else i should check or change
when swapping the belts, the bike has 7,750 miles and the last change was
before i bought the bike at 4,200 miles [four years ago], will i need any special tools.
thanks in advance for any help.
[first post for me] stay safe.]
p.s. what are the options for a manual.

Griff.