Step Motor difference between SS250 and Technobeams?

I just got done replacing motors on the Techno's and now need to fix the Studio Spot 250's. I was under the impression that the motors were identical, however I see that the T's are 35.00 for the 99270070LP, but the SS250's motors are listed for $42.00 for 99270070 (minus the LP, no idea what that stands for).

What is the difference?
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