New Pedals Use old Cleats or New

in MTB general
Hi all just a question I could not answer collecting bike with new pedals tomorrow XTR Trail, now would you use my current shimano cleats or install new cleats with pedals. The cleats are both the same, if to change with new can you also advise reason why. Thanks All
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Giant Trance 2 27.5 2016 ¦ Sonder Broken Road 2021¦ Giant Revolt Advanced 2 2019 ¦ Giant Toughtroad SLR 1 2019 ¦ Giant Anthem 3 2015 ¦ Specialized Myka Comp FSR 2009