The plates are probably the same and are at least very close to 10lb each. It's the pulley's that are different between brands. How much load you actually pull is determined by the angle and number of pulleys. I don't know enough about the mechanics of pulleys to explain it any better than that, but every manufacturer's pulley's are a little bit different.
And excellent progress Heather! You look great! Congratulations on all the weight and inches lost. You've done some great work these last few months. You're an inspiration.
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Lisa Holladay, CSCS
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