Choose the gamut that matches your files, not the largest number on a spec sheet. For web graphics, office documents, and most online images, 99% sRGB is a practical target. The IEC 61966-2-1 specification defines the sRGB color space used across common computer workflows.
That distinction matters. A 95% DCI-P3 rating refers to coverage of a wider gamut, not accuracy within sRGB. The two percentages use different reference ranges, so they cannot be compared directly.
For video grading or cinema-oriented work, 95% DCI-P3 can reveal richer reds and greens in compatible footage. SMPTE EG 432-1 specifies the DCI-P3 color space used in digital cinema. Check independent measurement data, not just the advertised figure: coverage, white point, and color accuracy all affect what you see.
In practice, a calibrated 99% sRGB screen can be more dependable for web delivery than an uncalibrated wide-gamut panel.
Small detail. Wide gamut can make ordinary web images look oversaturated when color management is poor. I would also check whether the monitor offers an sRGB mode; its factory setting may not be ideal.
These ratings help narrow the choice, but they do not tell the whole story.