4 square vs SFH spreadsheet...Why are my numbers that far off?

Good morning fellow BP fam,

I have been running numbers on an investment property I recently purchased. I watched Brandon's youtube video using the 4 square method and my CoC Return was 40.4% vs using the excel spreadsheet punching in the same numbers but coming back 10% lower. Just wondering if anyone can explain to me why this might be? and in the future which might be more accurate to use? Thanks!!