Wall of text incoming, you've been warned
Quick story: I recently purchased a strap from straposphere and was told that borealis is possibly a much better strap as it is made of a different material (silicon and rubber respectively)
Being skeptical and curious at the same time, I quickly purchased one from borealis to test it out. Turns out, I can objectively say that it is indeed a better strap in comparison than the one from Straposphere.
Now, I'm not trying to say that the strap from Straposphere is outright bad. It is pliable, soft to the touch and has no problem wrapping to my wrist. However, the borealis strap feels phenomenal when worn. The material feels more durable and yet still as pliable in comparison to its silicon cousin. The buckle feels more premium when compared to the Straposphere. Lastly, the vulcanised rubber seems to have less friction when the straps interact, which makes it easier for me to wear and remove the watch. Lastly, the rubber material also seems to have better heat dissipation when compared to the Straposphere, further increasing its comfort.
color wise I've selected black for both. The Straposphere is more of a jet black finishing and the borealis looks almost greyish to me.
Price: the Straposphere will cost you 18 USD and the borealis counterpart will cost you 25 USD. As Straposhere is a local brand, you will probably get an even better price. Does the borealis then justify the increase of price?? That is without a doubt a big yes for me. If I had to imagine, the strap from Straposphere feels like a playful youth seeking out for a brand new adventure wheares the borealis simply feels like a strong, sturdy companion that you can always rely on. Alright end of story.