I switched from ttf to ott because on bad days where I couldn't hit the side of a mountain to save my life I cant get a fork hit to send the ammo who know where I live in a residential area so a tray shot hitting something and have neighbors come out and start a stink is not something I want
I can shoot either way but, years ago, painful bandslap made me take a good look at TTF and I just developed a preference for it. (Yes I now know it was mismatched bands - ammo ) I had good accuracy almost right away and was thankfully not afflicted with fork hit issues so I stuck with it.
OTT for me is faster to load, more versatile for shooting at various distances, results in a more compact frame, shooting itself is more fluid, also preferred for heavier pulls. Like it on all type of frames. Easier to build a frame with this setup. Easier to add clips etc. too. I use it with corner of the mouth or "float" anchor.
TTF is great for a well known ammo-band-distance setup, or where precision (accuracy "on repeat") is the goal. Slower for me, more aiming, meditative in a different way. Like it on pinch grip frames (and thumb support). Tips require a bit more attention. Like to use with cheek anchor (Zygomatic Arch against Thumb).
Shoot both and you will gain confidence, skill and will have fun for sure!