surfermany hi there, I translated your text (use DeepL, it's great) so that other users can benefit too:
Does it make sense as a 2nd Board to a Freewave Stubby 95 for lighter wind with 7qm sail, to buy a Blast 100 In addition or is the planing and range through not such a big difference? or rather a larger Blast? but I use max 7qm sails. had once a Gecko ltd112 but I found that rather boring to drive gruss Many
Answer - I would rather get a Blast 115, to have enough difference in range of use to your FreeWave -the 100 Blast is a great board, but will have a fairly similar range to the FreeWave, at least in terms of wind strength and planing. The 115 works great from 5.3 all the way up to 7.8 or even 8.4 - but the best sizes are probably 5.5-7sqm. So rather choose the 115.