There may also be another factor here and that is having the hassle of an engineer visit and possibly having equipment mounted on the wall.
In my own case I'd have probably gone firstly to FTTC had I been able to get it as that would have been enough having gone from a 4 Meg ADSL connection.
FTTP or ADSL were the only options at the time (as OR didn't roll out FTTC because they had rolled out FTTP)
I'd have probably FTTC because it weould have been a case of placing the order and it going live on a certain day, like ADSL so no need to book days off work etc.
My hand was forced when it looked like I might have to work from home due to weather in early December and my connection started to flap.
Don't get me wrong, I wouldn't go back and all the OR engineer that came to do the install was great bit I did obviously have to book time off to be at home.
Virgin (ADSL) => Namesco => Newnet => O2 => Plusnet => Zen => Newnet => Zen => Freeola => Vivaciti (using O2 Wholesale DSL) => Xilo (C&W Wholesale) => Xilo (O2 Wholesale) => Xilo (TT Wholesale due to O2 Wholesale closure) => Zen LLU =>> ZeN FTTP (100 Mbps down, 18 Mbps up)
Router: Fritzbox 7530
Note: I don't lay turf for anyone. astro or otherwise, all views and opinions expressed are my own based on experience.