No need to to, just support the other one. I've being developing this game for almost 7 years and never reached at least something close to mid-popular visual novels in terms of support. I got used to that. Also some players still thinking that I'm gonna scam them, so I'm also a "scammer".
one thing to remember about the VNs is how oversaturated their market is. sure, the big ones have a lot of donators, but there's 20 unsuccessful VNs everyone ignores for every big successful one. there's so many, i basically ignore them all now.
also, it's not a binary thing; it's not choosing to support either you or that other project. it's waiting for both of you to get to a point in development where the "main gameplay loop" is fully implemented.
as an example, you've got a lot of work on quests done, but only the skeleton of the open world stuff the player might be doing alongside the quests. i just want enough of that "open world" to be able to hold me over between updates, because currently, i can complete the new content of an update in an hour or two, then it's another moth or two of waiting for more content.
not that i'm complaining! that's just about where i want to be before opening my wallet.