no, you bought the one that worked for you at the time. Costs less and has less horse power. option envy is not really worth your time. you've got an excellent ride, plenty of power, and an overall great machine.
Could you have more? yeah. but the real question is do you really need it? the added power really only comes into play at top speed. so unless you like spending all your time in smooth open fields or on roads you're never going to need it. The ride, is cushier, but has been described as riding a couch through the trails. I personally like to feel a little bit more of what I'm riding over.
The only reason I could justify an XP over the Value line in my eyes are if the Ergos fit me better. But you've already stated you love your 800. so obviously the ergos work for you.