Ahh that sucks. I had a good experience with Seth Lovers; however, I will admit, I no longer own them but I do own a guitar with Antiquities. Also, I find Seth Lovers best with their stock magnets.
But IME, the Seth Lovers had a punchier low-end and quicker attack (at least compared to the Antiquity which I find to have a very shelved low end and very spongy yet "organic" attack). The complex mids and additional compression of the Antiquities definitely crunch well so I can see how that can be interpreted as more aggressive.
The additional winds on the Antiquity makes them great for magnet swaps; they'll be ballsier and beefier than most. An Antiquity with an UOA5 will be the most ballsy IMO. OP should really try it out :bigthumb:
With that all said, I recommend Seth Lovers for their clarity and punch over the stock Antiquity (IF the UOA5 Ant does not work out). How the mids will behave will definitely be different. In fact, there's nothing quite like the Antiquity IMO. It's midrange is truly special though I would not say the pickup is not without its flaws (as with any pickup).