Tommy, i suspect there could be some difference in the cans inbetween the US and Europe (pressure/gasmix or something).
Back when i got my SPS burners here, i had quite a bit of an issue hitting the sweet spot with jets and adjustment of the mix.
Never experienced any of that with my BIX burners, they all burn relatively nice right out of the box..
(Naturally still need re-jetting and adjustments, if they´re used within a very large span enginewise.)
But as already said, i like the seperated individual flames on the SPS burners better. I just feel they´re so easy to see and adjust, compared to what appears to be one big fire on a BIX