Boys Flat Front Stretch Twill Pants 049 vs Boys Classic Fit Flat Front Pant: which is safer?

Where these two actually differ

• We flag Azo dyes and formaldehyde resins in cotton-blend fabrics, Antimony in polyester component, Elastic degradation and microfiber shedding and Residual manufacturing chemicals (oils, lubricants, sizing agents) on the Dennis Uniform and not on the Dickies.
• We flag Azo dyes and colorants, Antimony in polyester, Heavy metals in dyes and pigments and Residual solvents or sizing agents on the Dickies and not on the Dennis Uniform.
• The Dennis Uniform is cotton blend twill, no special treatment disclosed where the Dickies is cotton/polyester blend, no special coatings, which is most of the difference in these two grades.
• These two are level, close enough that price and fit should decide it rather than our grade.