as someone who has experience of finescale kit models, don't use Hornby. Its rubbish, the back to backs of the points are cavernous. Say you want to run a Tenshodo spud motor bogie through Hornby points? Forget it, the silly back to backs mean the Spud will derail, and its the points fault. Peco are perfect, awesome, pefectomono, you throw anything through them and 99% of equipment will run through it.
I will now give you an example of why Hornby points are terrible. I was lucky enough to visit Hornby recently, lovely place lots of lovely people. They have big demo layouts to display products and of course its all Hornby. Now in a passing loop was a rake of the lovely new Hornby pullmans and Mr Kohler tried to shunt them out of the loop onto the main. They derailed, every single one. Now what does that say? Hornby made the Pullmans to proper standards, the wheelset back to backs are OK, but, the points let the side down.
Now its ok on really short wheel base stock. Me and 960012 have run our uber finescale trams over Hornby points with reasonable success (derailments of the bogie trams still cause mild blood pressure increases, they are buggers to keep re-railing as they are small and fiddly :?), although my bit of the layout has a peco point simply out of preference. If you want proof of the pudding, I'll post you a film of a loco built on top of a Tenshodo Spud finescale motor bogie derailing on Hornby points, but not Peco.
I suggest this: for a toy trainset on the floor Hornby is fine. Model railways use Peco but masochists will use Hornby. I do use them occasionally, but only because I have loads sitting around. If you want to run anything and everything, use Peco.