It's an apples to oranges comparison. One of the two companies manufactures O(100) engines per year, flies them to orbit on a regular basis, and has had the opp

It's an apples to oranges comparison. One of the two companies manufactures O(100) engines per year, flies them to orbit on a regular basis, and has had the opportunity to examine and test O(50) engines that have flown and were recovered. That counts for a lot, even if the other company is going to test-fire a full scale methane engine sooner.