I had the same dilemma recently! Think about it this way:
Would you be willing to pay 31 cents a day for the Spire over the Vantage?
Because, that's what it would cost, over a 25 year timeframe! I replaced my last set of speakers which I had owned that long only because they finally failed.
I listened and really loved both speakers. Either way you can't go wrong. What swayed me towards the Spires, other than the economic analysis above, was the slightly greater sense of realism. The saxophone sounded fatter and fuller, like the real thing. The back-up singers had more presence. The female vocalist seemed to be there right in front of me!
However, as I soon learned when I received delivery of them, acoustics can be a LARGE challenge in getting them to sound as good as in a well designed/treated room. I am still experimenting, measuring, looking at my options on what to do, where to buy, how much to buy in acoustic treatments as I really did not envision making my living room look like a recording studio when I first started this journey!
Best of luck!