One differentiation for Viac Invest is that its structure seems to comport less risks than other reasonably cheap alternatives.
Finpension is its own bank. IBKR holds all asset in omnibus accounts. In contrast, Viac Invest holds assets in client denominated accounts at an established bank (Regiobank Solothurn). Furthermore, the WIR Bank covers loss up to 100.000.000 if Viac were to be bankrupt.
For people (such as myself) who consider counterparty risks, Viac seems worth considering.