I use little to no official study material myself, so my words may not carry much weight, but as an experienced BunPro user, I’d say it only makes sense to follow alternate paths if you were already planning on learning via those resources anyway; otherwise just let BunPro give you its own guided tour of the language.
So if you own the textbook but have been needing an impetus to stick with it, then yeah, maybe BunPro’s Genki path is the product for you. But if you’re not that vested in following along with Genki and just want to min/max your BunPro experience to get the most out of it in isolation, following the default path would be your best bet.
Either way, as @Stormblessed noted, there’s no real risk since you can hop around paths any time, so it won’t hurt you to experiment and see which one you like best. Gotta try both to make a fair comparison in that case though!