So, i deside to make that versus between these 2 boards..
I've made some sessions with 9m and 12m kite...
north select 137 .............. bts fs 136
comfort : 10/10 .............. ..... 9/10
pop : 9/10 .............. ........ ... 10/10
upwind : 9/10 .............. ........ 9/10
speed : 9/10 .............. ....... 10/10
carves : 8/10 ............. ........ 9/10
flex : medium ...................... hard
spray : 10/10 ................ ....... 8/10
early plan : 8/10 ................ 10/10
weight : 9/10 (carbon) .............. 10/10 (carbon 1.7kg - 400gr less)
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RESULTS: 72 ............................... 75