the 125 is not going handle chop near as well.
Sorry to 'disagree'
here, but I (84 kgs) am just astonished about how well the iSonic 125 handles chop (and I mean real chop).
Because of change of boardquiver the 125 was my only board at a time I had to use a (obviously too small for the board) well powered up RS5 6.7 on it. Water conditions were really rough, but the iSonic just flew over everything that was thrown at it, despite its volume (has it really 125 l ?) and being 75 cm wide.
Fantastic (and really fast) board and I am now waiting for my 101...
Grtz & have fun