I will give you my thoughts as well - dont know if they are of any value though.
Usually I look at this with two angles: What a person with very little tech understanding sees, and what a tech-savy person sees. I can run my own CLN, but another person can not.
To the "normie", Alby, WoS and Mutiny are largely one and the same; an app that stores sats. To a more tech-savy person, they see the custodial nature of these wallets. Hence, I actually trust none of them - neither WoS, Alby nor Mutiny. If I can run it myself, I will.
But if I had to recommend any of these three to someone just joining Nostr, I would look at how likely it is that they will run their own node. If not, I will show them Alby. If they might, I am more leaning towards Mutiny.
Even if sats are effectively micro payments akin to Twitch Bits and this sorta stuff (values in the cents, most of the time), it's important to have a good and quick starting point to get into using them early. From there, one should learn what they are actually using, on a base level, to have enough understanding of "Who am I trusting with what".
Self-custodial is often the most private and independent solution, but it is not one everyone can take. Since Mutiny appears to be "Nostr First", I am leaning towards suggesting them over Alby, personally.
The only reason I have so far excluded Wallet of Satoshi is because I have seen it being down fairly often recently and there seems to be no representation here on Nostr - in fact, I haven't even seen a WoS maintainer here, nor spoken to one... So it feels very distant, thus even less of a trust-able candidate (-able, not -worthy).