I ride the SFB and am from the east. I really like it.
Line has had a real knack for making fun, playful, yet not noodle skis. I'm 185 lbs, type 3+ skier, with 20 years of skiing background. I don't spend a lot of time in pure-park mode anymore, but I do like to hit mach 5 GS turns and float big 180s over rollers. I ended up going with SFB because I wanted a more playful ski that can handle some speed. Can I lay out a turn with SFB like I can my old Prophet 90s... no, not quite. I can still book it, but it's not the same. Totally different construction and dimensions.
When you compare the skis side by side here are the major differences:
-Mounting: the SFB -2.5cm, the Blend -4cm
-Turn Radius: the SFB: 17.7, the Blend 19.8
-Camber/Profile: SFB more pronounced comparatively than the Blend
So, the differences are not huge. The Blend is a little more alpine design while the SFB is more Pollard-esque, generally speaking. I can't really speak to the Blend because I've never ridden it, but the SFB feels good--you can play with it but when you lay into it on packed snow it doesn't wash out like you might expect. It has good energy when moving through turns or popping. It's a pretty nimble ski, surprised me for what I expected, even in tight spaces. That said, it can be a bit twitchy in rougher conditions, not something a capable skier can't compensate for though. All around a great ski and I'm really happy with my purchase.
Overall, it looks like you're looking at two very similar skis. I think it boils down to your style and honestly, whichever one you can find cheaper if $$ is a concern for you. Either way you won't go wrong!!
Don't forget to check your oil.