Hello, I have both, since the test strips came with the hot tub and I had the K-2006 from owning my pool.
After refill, before temp rise:
Test strip: 7.4 (ish, since the test strips are hard to read)
K-2006: 7.4
After temp rise to 102:
Test strip: 7.4 (ish, since the test strips are hard to...