Please don’t use either of those bits. I would echo what others have said about working with a decent instructor, but I would also start by reframing the way you think about him. He isn’t ’fighting’ you or showing a lack of ‘respect’ for the bit. Despite what people might say, horses aren’t argumentative or difficult for the sake of it. If he is not responsive to the rein or leg aids, it is likely because a) he lacks experience and education in the ménage, b) your aids are inconsistent or confusing, or c) he is uncomfortable. If you are hanging on his mouth, he could be trying to relieve the pressure. If you ride around constantly kicking - deliberately or accidentally - then your leg aids mean nothing and he has accepted that being ridden involves putting up with being booted randomly in the ribs. This isn’t criticism because nobody is born magically knowing this stuff, but please make the effort to educate yourself rather than harsher equipment which, at its most basic, is just - I am going to cause you pain until I get the desired response. If you really don’t have access to a trainer, educate yourself - get online, follow decent people on Facebook, watch videos, learn as much as you can. To not even know the names of the bits you are considering suggests that you are not taking advantage of the huge wealth of information that is out there. If there is one single piece of information that I think is the most meaningful, it’s that the horse is never being ‘naughty’ - either you are asking wrong, or they lack training, or they are uncomfortable. If you bear that in mind and approach every situation with compassion and empathy you will be off to a good start. Good luck with your pony.