Yeah Husk it's pretty neat.
Planes:
The main difference between arcade and realistic is everything is automatic on arcade, for example you start off in the air, when you run out of ammo you reload automatically, you have an assist aim when you get close enough that helps you know where to shoot, in realistic mode you have no aim assist you must land on the friendly airbase for repairs, refuel and reloading ammo, you must also take off and landing manually using the gear up/down functions etc, also you must be careful with moving around as you can break wings by turning too fast at high speeds etc.
I am not keen on tanks to be honest, I enjoy watching Baron play tanks but for now I will stick to planes.
For planes there are 5 tier ranks, I II III IV and V, ranging from light early model propeller planes to badass jet fighters and heavy propeller fighters, the main difference between planes of the same kind you can use different bombs/ammo, also there are different types of plane, naval fighter/light fighter/fighter/jet/bomber etc, they are all useful for different tanks/styles of fighting.
I've been doing quite well this morning, i've finished in 1st place overall 5 times and 1st for my team about 10 more times, i've got most modifications for the planes I have currently, currently I am loving the P-36A Hawk / P-36C Hawk and P-36G Hawk fully modded, I also purchased the Thach's F2A-1 Buffalo which is fully modded, for ammo I always use stealth, in arcade mode you don't really need the tracers because you have the aim assist, but you can choose not to use the assist from what i've heard, some people tend to use default(tracers included) for a better indication of where they are shooting, but many players have said after playing AB(Arcade Battle) for so long they have a much better idea of where to aim in RB(Realistic Battle).
I've currently unlocked 5 Tier 2 planes and have just started researching Tier 3, just about to unlock my 1st Tier 3, but I won't move onto Tier 2 rank fights for a few weeks, I will do each for a few weeks I guess, I tried a Tier 5 after purchasing the Spitfire IX(USA) and got my ass handed to me lol, I did get some kills but nowhere near the success I have in Tier 1 with my fully modded planes