I have both the EXO and Ammit 25 in tall boy status and both tanks are great. The Ammit has a very slight edge on better flavor. Both are great tanks.
I am currently getting a little seeping from the Ammit which may be related to a bad press fit on the JFC.
The only problem I have with the EXO is that sometimes it can be a pain to remove and open the top cap due to the recessed knurling. I've had to wrap it in a towel or my shirt to get grip, the odd time I would even need a rubber band or rubber gloves.
The Ammit 25 top cap is great and I've had no issues with it getting stuck even tho the top cap is completely smooth with no knurling.
Only downside for me right now is the slight seeping between the AFC and the base itself. Another user has reported this issue also so you may want to wait a bit to see when everyone gets theirs. I was one of the first ppl that received mine because I was on pre-order.
Have you ever try to fit a 4mm coil or notch coil into the Ammit 25? For IJoy Exo there is big enough room for these coils. In fact I plan to order a Tesla Nano 120W mod and Ammit 25 tank from Fasttect asap, but my doubt on the below has held me off:
1. Can Ammit 25 holds big coil (4mm or even 4.5-5 mm notch coil)
2. How hard it is to trim the coil lead so that it won't touch the chamber and create a short.
I own 2 Exo, both seep lightly at the AFC but I simply don't care. For Exo, my advice is not to close its top cap too tight, just enough will do. Try close the top cap a bit loose than you usually did, you will find it won't leak from the top even if you lay it down horizontally.