The Crucial T705 4TB wins in 5 out of 7 comparable specs, with 1 tie. Its biggest advantage is Sequential Read (164% better).
WD Blue SN5000 4TB wins in 1 spec (MSRP: 68% better).
Recommendation
Choose T705 4TB if you want the best overall performance — especially sequential read.
Choose WD Blue SN5000 4TB if msrp matters more to you.