ziiip cpu fields in smf data

Document ID : KB000097119
Last Modified Date : 24/05/2018
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My questions are:

1) what is the difference between TASSYTI & TASTIMSY vs, TASUSTI & TASTIMUS?

2) currently i report, track, & trend only TASTIMSY & TASTIMUS, and we saw only a small difference before and after implementing ZIIP, so how should i incorporate ZIIP cpu figures from SMF to measure performance?
The difference is one is in 10,000ths of a second and the other is in TOD format.
The TOD format is derived using a STCKE instruction.

See the IBM principals of operations manual for a complete description of the STCKE and what the value represents.
Additional Information:
z/Architecture IBM Principles of Operation