What makes it better? I've been using Streisand quite successfully, and the setup appears easier from the little I've read about Algo (haven't implemented myself yet)

Personally I like Algo because it also handles provisioning a dedicated VPS with some sane system defaults. It also sets up IKEv2 and Wireguard together, which makes it easier to have a multi-platform VPN out of the box without having to set up Wireguard & IPsec separately. It may not be what everyone wants though, Streissand is great in its own ways too.