My tiler is getting ready to install ADKO dewdrop powder glass tile. Is there a difference in quality between RXFL and Ardex? He wants to use RXFL unsanded grout with a built-in sealer.

ADKO's spec sheet recommends this (long list, copied): "ARDEX X 77™ MICROTEC® Fiber Reinforced Tile and Stone Mortar (for interior applications) • ARDEX S 48™ Rapid-Set Mortar / Mastic Hybrid (for interior applications) • ARDEX WA™ High Performance, 100% Solids Epoxy Grout and Adhesive (for submerged applications) Recommended Grout • ARDEX FG-C™ MICROTEC® Unsanded Grout Caulking • ARDEX SX™ 100% Silicone Sealant for Tile and Stone Applications See complete setting material product technical information and installation instruction at ardexamericas.com. SEALING There is no need to seal glass tiles, however check with your grout manufacturer to see if your grout should be sealed. Recommended Grout Sealer: •FILAGROUT PROOF"