Below is a quick overview of the 2021 Vans snowboard boots lineup.
First I will take a look at any new boots for the 2020-21 season, and any old 2019-20 boots that aren't returning with a 2021 model.
Then I'll look at each boot and put them into the categories where I see them fitting best.

New 2021 Vans Snowboard Boots
The new boots for 2020-21 are:
Exiting 2020 Vans Snowboard Boots
The 2020 boots that aren't returning with a 2021 model:
All 2021 Vans Snowboard Boots by Category
I have categorized Vans's 2020-21 collection below. This is according to the categories here at SnowboardingProfiles.com and not necessarily the same as how Vans labels them.
Of course these are only broad categories as every boot can be used for more than one of these purposes, but this is a rough guide.
VANS BEGINNER SNOWBOARD BOOTS
Men's
Women's
VANS FREESTYLE SNOWBOARD BOOTS
Men's
Women's
VANS ALL-MOUNTAIN SNOWBOARD BOOTS
Men's
Women's
VANS FREERIDE SNOWBOARD BOOTS
Men's
Women's
VANS YOUTH SNOWBOARD BOOTS
Summary
So there you have the 2021 Vans snowboard boots.
A couple of new boots coming in and a couple of outgoers. The Invado Pro is predominantly a name change from the Implant Pro, with a few tweaks, while the Invado OG is a completely new offering, similar to the Invado Pro but with a softer flex and less premium.
The Hi-Country & Hell-Bound is the other new offering, which replaces the outgoing Sequal, but with more of a re-build re the Implant Pro vs Invado pro comparison.
For Snowboarding Profiles' Vans snowboard boot reviews, check out the link at the button below.