Choral Arts Stainless Steel Water Bottle, Ember Choral Arts vs 20oz TKWide with Café Cap, Tofu: which is safer?

Where these two actually differ

• We flag Trace nickel or chromium leaching and Bacterial growth in cap gasket on the Ember and not on the Klean Kanteen.
• We flag Powder-coat cap degradation over time, Bacterial biofilm in cap threads and seals and Thermal stress on seals at extreme temperatures on the Klean Kanteen and not on the Ember.
• The Ember is stainless steel, uncoated where the Klean Kanteen is Stainless steel bottle, stainless steel cap, which is most of the difference in these two grades.