Crosskites 1.8 if I'm not mistaken is actually a 1.8M size and would be much larger than the 180 and slightly larger that the Symphony 2.2 There are 2 different ways to measure these kites, until you mentioned the Crosskites, you were talking about Sport Size, once you get into Square Meters, you are truly in the power kite territory..
Here is a Symphony 2.2 (sport size) laying on top of a Crossfire 2M (Square Meters) kite.. Notice the 2M kite is much larger and much more powerful.. Mkae sure when you are looking at the numbers you are aware of which numbers you are actually using.. Power Kites, Square Meter sizing is also known by the term Traction Size and are literally tuned to provide maximum pull to propel a buggy, board or other transportation device..
Here is Chris Shultz from HQ Kites using my 4M Crossfire to scud through the sand at Jockey's Ridge..