iPad gen 7 is slow, time to upgrade

My current iPad is a gen 7 with 128gb of storage, of which I am using 34gb, it’s running pretty sluggish on certain websites, also if I go to another tab on Safari when I go back to the original it takes forever to reload, instead of just staying where it was. So my question is, I’m thinking of getting the Air Refurbished from Apple with 64gb, will that be ok since I’m at 34gb with my current one. Heavy lifting in is done on my Mac and IPhone.