ANA v1 is now a discontinued product, so it's not possible to purchase it anymore and yes, the presets for ANA v1 are different products that won't be compatible with ANA 2.
Bear in mind that ANA 2 is a completely new soft synth development product, it's not a simple ANA 1 upgrade but a new instruments with a lot more features & improvements.
Since ANA 2 started, many presets packs have been crafted to get you cover in many genres and there will be more to come. At this time there's already 7 presets pack and also an Ultimate bundle presets that will include the first 6 packs ( just the latest Synthwave presets pack is not part of the bundle ).
So right now, you really do not need to have both ANA v1 & ANA 2 since many genres have been recreated in new presets packs for ANA 2.
Already existing owners of ANA v1 are eligible for a discount on ANA 2 and they can still purchase ANA v1 specifics packs of course, that's why those are still available on the site. But right now it's not possible to buy ANA v1 anymore.
On this page you'll find all up to date Presets Packs for ANA 2 at the moment, and as a reminder there's a 20% off on all products going on until the end of January