Sass compatibility between Ionic V1.3 and V2

we are developing a new theme using Sass and have to support Ionic 1 and Ionic 2.

Is the Sass variables etc. compatible so that we can only have one theme implementation and use it for both versions?

Or would it be better to implement the theme twice, for V1 and V2?

Thanks a lot,

For V2, you might be better off writing a theme again

These docs go over the details for V2 as it’s changed a bit since V1. It also provides a list of all the variables used in V2