Glass fleece is stronger, but not always necessary
Most new-build homes use renovlies because it looks smooth and combines well with paint. Still, glass fleece wallpaper can sometimes be the better choice. It is stronger and handles intensive use well, making it useful in hallways, stairs, utility spaces and homes that need extra durability.
The question is not which material is always better, but what the room needs.
Difference in appearance
Renovlies creates a very calm painted wall. Glass fleece can show slightly more structure depending on the type. Some homeowners like that; others want the smoothest possible look. This should be discussed before the material is chosen.
New-build movement
New-build walls move during the first years. Both renovlies and glass fleece can make small cracks less visible. In normal living spaces, renovlies is often enough. In high-use areas, glass fleece can add confidence.
Painting still matters
Glass fleece is only complete after good painting. Paint determines coverage, cleanability and appearance. Saving too much on paint reduces the benefit of the stronger material.
Conclusion
Glass fleece wallpaper in new builds is logical where extra strength matters more than the smoothest renovlies look. For most living areas, renovlies remains the calmer choice; for intensive zones, glass fleece can be wise.