Xfi Gen 2 pod v Stormready WiFi for WiFi Extender

I am planning to upgrade some Gen 1 Xfinity pods to a Gen 2 Pod. However, I noticed that the Stormready unit also operates as a WiFi extender during normal operation. I’m trying to figure out which one is a stronger Wi-Fi extender but can’t find much technical info on the Stormready unit. Can anyone assist?

I don't need a Gen 2 Xfi Pod and the Stormready unit but if the Stormready is as good or better then I think it would make sense to spend the extra money to have that instead with the battery backup. I just can't figure out which is stronger.