Buy the Olaplex N°.9 Bond Protector™ Hair Serum.

It does a job every hair type actually needs, and it does it without the mixed reviews Virtue is carrying.

What was compared

1. Reviewers agree it works, no split verdicts
Olaplex reviewers consistently report shinier, frizz-free, detangled hair. Virtue reviewers report clogged drains, a greasy scalp within days, and hair that 'felt dirty' after two days. One of these is a safer bet to actually like.
2. Works on every head, not just curly and wavy
Olaplex is built for all hair types and textures. Virtue Smooth is aimed at curly, wavy, frizz-prone hair, and reviewers with finer or oilier hair report it leaves them greasy. Unless your hair is specifically curly and frizz-prone, that targeting works against you.
3. One bottle outlasts a year of styling
A reviewer reports a 90mL Olaplex bottle lasting about a year and a half at medium length because you only need a few drops. Virtue is a daily-use shampoo at 8 fl oz, so it empties fast no matter how good it is.
4. Heat and pollution shield, Virtue only cleans
Olaplex protects hair up to 450F and claims 48-hour pollution protection on top of smoothing. Virtue is a shampoo, it cleans and smooths but has no heat protection, so you'd still need a separate product before styling.
5. Yes, Virtue is cheaper per ounce. Buy Olaplex.
Virtue runs $5.50 per fl oz against Olaplex's $10.67, a real gap on paper. But a cheaper ounce means nothing if it clogs your drain and leaves your scalp greasy within days, and Olaplex's small-dose use closes most of that cost gap anyway.