Different shaped SFxT VS sticks?

Are the old one's squared and the new ones trapezoid shaped? I have the non squared one but just noticed some were square. I can't find any information regarding this change. Does anyone know if the square ones are deeper or are just the edges different shape?

SO weird. Was hoping maybe the square ones were taller and maybe a HAPP P360 or SUZO 500 would fit.

SEE PICS:

Thanks!

Square:
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Not Square:
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