Craigo

Your choice, your risk. Lots if differing experience with the Hubble if you search the forum. Volta is far more of an unknown factor. I've just given my 2c based on a datasheet, maybe you could get one and give real world feedback to all.
As others have said, I would cast the net wider for more options of 1C batteries and search the forum for views.

No real-life experience with the Volta, but the claimed specs are superior i.t.o. 6000 cycles to greater discharge of 80% instead of 50%. For a lower price. I also like the floor-standing option.
For me and my money I'd be asking where's the catch. For example, why do they promote it as a 1C battery with max 100A discharge, but all the graphs and tech parameters on the datasheets are based on a 0.5C discharge rate? That's not what I'd be interested in, in your setup you need 2 x 1C batteries.