Here is the Comparison.
Frequency Tolerance at Normal Temp : +/-20ppm Frequency Stability over temperature : +/-50ppm Operating Temperature Range : -40 to +85degC
Frequency Tolerance at Normal Temp : +/-50ppm Frequency Stability over temperature: +/-150ppm Operating Temperature Range : -40 to +150degC
NX3225GD-8MHZ-EXS00A-CG04874 is a reference design part, and doesn’t have a published data sheet. The parametric information in the attached spreadsheet calls out the electrical differences in the parts. There is no part number breakdown for either of the parts, the part suffix is the spec that the part is built to.