Can’t really compare to Playtomic. Playtomic I find is specific to the location or area, a specific person plays the most, whereas Stratford anyone who goes there is rated in the same way. I was a 3.5 at Stratford since I joined there, play every now and again, and then went up to a 4 based on a tournament performance. I am around a 4.5 on Playtomic. Not played a 4.0-4.5 match at Stratford yet to comment. But I beat 4.0 pairs in the tournament as a 3.5.