plugsGo to a boot fitter. If a “racing” boot fits the best that’s the best boot for you. One of my friends has the smallest feet ever and the boot that fits him best is a 93mm Lange race boot and he loves it. A lot of the guy on atomic use Redsters too I know Jossi wells did.
If it fits your feet though the Lange rx line is my favourite, same shell as a consumer race boot but there’s a shock absorbing foot board to take the sting outta bigger impacts, the liner in the race boots is a lot nicer though.
Luckily these days there are a lot of good fit options out there for low volume feet that are not race boots. Race boots can be good for the right thing , usually hard snow skiing, but for the skiing most people do in more variable conditions I really do think they have some drawbacks. If you really need the lowest volume I would personally go for a good non race boot with the features you need and get a foam injection liner to secure the feet. Yes it may end up being more expensive but it will be more suitable for most skiers in my opinion.