I have done 100 jumps on my xaos 88.I find it to be a fantastic canopy for swooping.The only other "cross-braced" canopies I have jumped are Xaos88-27 cell,and Xaos 78-27 cell(mine is a 21 cell)I do find the 27 cell Xaos to have slightly more lift(longer swooping distance) than the 21 cell.So little however that I can barely tell the difference.
The 27 cell Xaos also recovers a little Quicker from a turn than the 21 cell.
The 21 cell Xaos will lose more altitude from a front riser turn .I am by no means an expert,in fact I have just started learning the art of swooping,but I do find the best wing load to be 2.5.I always load my Xaos between 2.2 and 2.5.A 2.5 wingload simply goes faster and further!
I must say that if given a choice I would prefer a 27 cell Xaos.If two people with the exact amount of skills were to compete,using a 21 and a 27 cell Xaos,the one with the 27 cell will swoop further.
The Xaos 21 cell is however by far the best canopy I have ever owned!I could jump it forever !