The Crucial T700 1TB wins in 4 out of 7 comparable specs, with 2 ties. Its biggest advantage is Sequential Read (127% better).
WD Black SN770 1TB wins in 1 spec (MSRP: 69% better).
Recommendation
Choose T700 1TB if you want the best overall performance — especially sequential read.
Choose WD Black SN770 1TB if msrp matters more to you.