Diaper rash

Question for mommas that shop at SAMS Club! We’ve ALWAYS used and loved huggies, but recently picked up a box of the Members Mark diapers (Sam’s club brand) to try since you get so many for cheap and we’ve heard good things. Ever since I feel like he’s had a reoccurring diaper rash. BUT he’s teething and has been going poo A LOT more often. Wondering if there’s any mommas that’s been having trouble with the diapers to narrow the cause down? *to be safe I just ordered Huggies to be delivered today*