Sorry about that, didn't know serial numbers needed to be hidden. Did a quick benchmark on both drives with CystalDiskMark. The refurbished one is slower than the original one but shouldn't both these drives be getting around 180 MB/s? They both seem really slow compared to benchmarks online.
Original Drive:
Sequential Read (Q= 32,T= 1) : 131.315 MB/s
Sequential Write (Q= 32,T= 1) : 132.612 MB/s
Random Read 4KiB (Q= 32,T= 1) : 1.458 MB/s [ 356.0 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 1.666 MB/s [ 406.7 IOPS]
Sequential Read (T= 1) : 142.808 MB/s
Sequential Write (T= 1) : 137.346 MB/s
Random Read 4KiB (Q= 1,T= 1) : 0.516 MB/s [ 126.0 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 1.581 MB/s [ 386.0 IOPS]
Refurbished Drive:
Sequential Read (Q= 32,T= 1) : 125.989 MB/s
Sequential Write (Q= 32,T= 1) : 115.640 MB/s
Random Read 4KiB (Q= 32,T= 1) : 1.969 MB/s [ 480.7 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 1.856 MB/s [ 453.1 IOPS]
Sequential Read (T= 1) : 129.172 MB/s
Sequential Write (T= 1) : 118.284 MB/s
Random Read 4KiB (Q= 1,T= 1) : 0.609 MB/s [ 148.7 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 1.831 MB/s [ 447.0 IOPS]