Both have lifetime warranty on electronics as well. I have used both and actually like them both. The 7X is really nice for ranging. I think the Maven glass is a tad brighter and I like the different reticle options on the Maven. The wheel is surprisingly intuitive. It was a little hard getting used to the forest and field mode for me. I like being able to scan and have the yardage back and forth. The Maven doesn’t have this so I would suggest reading about their field and forest mode as they are unique and actually pretty cool.
The razor does scan up and back. It’s not a bad thing for the Maven just something I was used to with all the other rangefinders I’ve used. I ranged with both easily over 2500 yards. They are both a little larger than say the Leupold RX series or Sig Kilos. If the Sigs had lifetime on electronics I would probably look more at those but I’ve had too many rangefinders fail on me.
I don’t think you can go wrong with either but for me I would go Maven or the one I can get best deal on.