I have some fujimi's, pair of AZ's, Academy thrown away, and looking forward to some kitbashing:
Fujimi is crisp, easy to build, but it has certain nasty issues - cowl, radiators, cockpit etc.
Surprisingly, AZ's kit is not worse, nor better, if you keep in mind, that it's short run. It may be better in shape in certain areas, it may be worse to build, but somehow I feel disappointed in lower wing, radiators area, on the other hand, I liked at least basic features of cockpit inside. Really I cannot favour one over the other. But, there's one crucial point - the price.
If someone feels brave enough to do some kitbash, and is hard limited on his pocket, for almost half the price I can get Airfix XIX and IX, and crosskitt to get XIVc, with some milliput I can get even X/XI from the crosskitting waste. Counting the price of kit itself, and, counting even the secondary product of X/XI, easily you can get to quarter of price fujimi or AZ - but, what a amount of work...
BTW, looking into scrapbox on old XVI of heller, and XIX of airfix... What about XIVe...?