Bear in mind – the Scandal frame uses a kinked seat tube – the effective seat tube angle is ‘synthesised’ and not a true seat tube (post!) angle.
This means that on the same frame size – if your at the smaller end, with a lower seat – you have a steeper seat tube, and a shorter top tube length, or if you are taller, you will have a slacker ‘real’ seat tube angle and a longer top tube.
I am 5ft10 with short legs and had a medium. Think about what dropper post length you want to run, and compare the C-T seat tube measurement to your current bikes.