Mounting TV antenna to rectangular chimney: Z or Y bracket is sturdier in wind?

Hello,

I'm new to the forum. I will be moving my TV antenna from the attic to outside the house to get better reception.

My plan is to mount it to the chimney using a standard 5 foot mast but I want to make sure it's sturdy and will not have any issues in high winds.

Is a Y bracket or Z bracket mount going to hold up better if I have a rectangular chimney? I saw Solid Signal has both but I was not sure which is sturdier for my situation.

Thanks all in advance for your thoughts!