Hi there,
Well, normally not supposed to give out any info, but the Jag shape will indeed be unchanged for 2021, releasing mid January...
9.5 is a pretty big sail for the Jag 125, but would work at a pinch - why not take the 135? you are not too heavy so the 125 would still work I guess...?
Choose the Blast is you are not focussed on top end speed/tighter manoeuvres are your priorities. Jag if a bit more top end speed and bigger sail carrying capacity due to the extra width?