I find they fit long in the torso which is good for DD as she is all torso and short legs- come to think of it the back is kind of open on the two she has straps criscross, but open space- maybe they are the open back type the other poster was talking about. DD wears a size 7 in clothes and a CL in Leos (due to a long torso- shirts are often too short on her and we have to size up)- the CL is very roomy in Motionwear- very roomy with plenty of length. DD likes them, they are not my favorite she has, but the 2 she has are always the 1st she goes for if they are clean.
GK has a snugger fit- better fit- the Motionwear is baggy where it shouldn't be baggy, not as good of a fit IMO- good practice leos though.
Snowflake is waaaaay bigger in the butt than Motionwear. Motionwear is long. DD has a CL and AXS Snowflake and 2 CL Motionwear and the sizing is different- I'd compare the CL Motionwear to a AXS GK or Snowflake. DD fits perfectly into CL GK and Snowflake- the Motionwear is very roomy all over.
Hope this helps- and please remember what fits my kid one way may fit your kid an entirely different way.