I’ve made a list but all I can do is looking at website because at the moment traveling is still rather impossible where we are. I’m spending 2-3 hours daily and sharing with kiddos on dining table. They’re practicing SSAT, doing well on math but terrible on reading and verbal. Yikes!
DD is more social, more open yet more emotional, expect more attachment with friends, talkative, articulated, argumentative(sometimes funny sometimes annoying and tiring to answer). Academically, less accomplished compared to DS but is quite competitive and has goals in her mind although always looking for short cut so she doesn’t have to work too hard or too long.
Aside from academics(I’m not worry about this part), DS has soft heart, prefer teamwork to individual competition, not overly talkative but able to write amazing essays, has vast knowledge both in literature and current news, his knowledge amazes me for a 12.5 year old. Good study ethics, interested in picking apart computers and iphones(always watching youtube tutorial and reviews). Showed interest in finance at such young age too while DD just spend as she wishes 
They both are socially and emotionally ok but I wouldn’t say 100% mature. They still need our encouragement and guidance at times. DD is more open, DS doesn’t talk much about his friends and is more private I feel.
In my mind I hope to find a not overly competitive school as I’m sure they all are as rigorous. I’d prefer an environment where they are happy especially since we’re far.