There's only so much that you need for a truly satisfying vape. If all you want is excess then it's hard to beat the mesh pro with quad core coils. But IMHO it's just totally unnecessary. Too much vapour and far too high juice consumption. For me the mesh pro works best with dual core coils. Flavour is excellent, vapour production plentiful and juice consumption acceptable.
The Falcon King has multiple coils to choose from with the entire falcon range being compatible. The dual and triple core coils give tons of flavour and vapour as does the M+ coil.
With the advances in mesh stock coils it's now all about finding the right balance between flavour, vapour and juice consumption. Personally, I don't want a fog machine and I don't want to refill a 6ml tank every 10 minutes. The Mesh Pro and the Falcon King are both at the top end of the mesh tank market and you can't go wrong with either. I first bought the mesh pro and I've had it for a long time. More recently I've purchased a Falcon King and I'm thoroughly enjoying it. Which is best? I couldn't tell you because they're both fantastic. But they're different tanks with different coils. For every person you find who rates the pro first you'll find someone else who rates the king first. At this level of quality and performance it all boils down to personal preference.
The Falcon King has a far superior filling mechanism with its locking top cap. The only real flaw with the Mesh Pro is the top cap being a simple push and slide. Very easy to open accidentally if you take it out and about with you.