mn% seems to be similar for both srr and spi

When I look at the raw data for SPI and SRR, it seems that they are both similar.

SRR might actually have better raw data results overall (maybe someone could average the results for both companies).

(The metallurgical results predicting 46% are just that...predictions which may end up being true but when comparing SRR to SPI we should use the raw data.)

However, what I would like to know is this:

-the Fe% seem to be higher in the SRR results, compared with SPI. what is better?

-the silicon dioxide (SiO2) seems to be lower in the SRR results compared with SPI, what is better?

Please DYOR.