I agree with the 498 is 'like' a Custom 5. I don't know what the 490 is like. Or care. If this set works for you - great. Rock it in good health (or jazz it, blues it, whatever).
Securb is a fan. While I could play whatever with these pickups, I could easily find a number of other pickups I prefer for any given purpose. as a set over all, the work for whatever, and are are great at nothing IMO. But even at that - if you just got a guitar with them, live with them for a while. Just on principle...you might like/love them.
But just like I think a Jazz is a way better version of a T-TOp, I think the C5 is a way better 498. Not that I am a fan of either in general.
And yes - Gibson does make some fine, if over-priced pickups: P90, 500T, BB1, BB2's, Dirty Fingers, so I'm not Gibson hating. But that set just isn't my thing.